diff --git a/app/src/main/java/com/cornellappdev/resell/android/model/api/AvailabilityApiService.kt b/app/src/main/java/com/cornellappdev/resell/android/model/api/AvailabilityApiService.kt
index 632d9cb..75f7d18 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/model/api/AvailabilityApiService.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/model/api/AvailabilityApiService.kt
@@ -3,12 +3,16 @@ package com.cornellappdev.resell.android.model.api
 import retrofit2.http.Body
 import retrofit2.http.GET
 import retrofit2.http.POST
+import retrofit2.http.Path
 
 interface AvailabilityApiService {
 
     @GET("availability/")
     suspend fun getMyAvailability(): AvailabilityResponse
 
+    @GET("availability/user/{userId}")
+    suspend fun getUserAvailability(@Path("userId") userId: String): AvailabilityResponse
+
     @POST("availability/update/")
     suspend fun updateAvailability(
         @Body request: UpdateAvailabilityRequest
diff --git a/app/src/main/java/com/cornellappdev/resell/android/model/profile/AvailabilityRepository.kt b/app/src/main/java/com/cornellappdev/resell/android/model/profile/AvailabilityRepository.kt
index 1ccf827..11602df 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/model/profile/AvailabilityRepository.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/model/profile/AvailabilityRepository.kt
@@ -5,6 +5,7 @@ import com.cornellappdev.resell.android.model.api.RetrofitInstance
 import com.cornellappdev.resell.android.model.api.UpdateAvailabilityRequest
 import com.cornellappdev.resell.android.model.api.UserAvailability
 import com.cornellappdev.resell.android.ui.components.availability.helper.SLOT_DURATION_MINUTES
+import java.time.Instant
 import java.time.LocalDateTime
 import java.time.ZoneId
 import javax.inject.Inject
@@ -14,8 +15,12 @@ import javax.inject.Singleton
 class AvailabilityRepository @Inject constructor(
     private val retrofitInstance: RetrofitInstance
 ) {
-    suspend fun getMyAvailability(): UserAvailability {
-        return retrofitInstance.availabilityApi.getMyAvailability().availability
+    suspend fun getMyAvailability(): Set<LocalDateTime> {
+        return retrofitInstance.availabilityApi.getMyAvailability().availability.toLocalDateTimes()
+    }
+
+    suspend fun getUserAvailability(userId: String): Set<LocalDateTime> {
+        return retrofitInstance.availabilityApi.getUserAvailability(userId).availability.toLocalDateTimes()
     }
 
     suspend fun updateAvailability(slots: List<LocalDateTime>): UserAvailability {
@@ -40,4 +45,12 @@ class AvailabilityRepository @Inject constructor(
 // The backend stores/returns dates as UTC instants (e.g. "2026-01-23T16:00:00.000Z"), so
 // device-local wall-clock times must be converted to an instant before sending.
 private fun LocalDateTime.toUtcInstantString(): String =
-    atZone(ZoneId.systemDefault()).toInstant().toString()
\ No newline at end of file
+    atZone(ZoneId.systemDefault()).toInstant().toString()
+
+// The backend sends startDate as a UTC instant (e.g. "2026-01-23T16:00:00.000Z"), so it's
+// parsed as an Instant and converted to the device's local wall-clock time.
+private fun UserAvailability.toLocalDateTimes(): Set<LocalDateTime> {
+    return schedule.values.flatten().map { slot ->
+        Instant.parse(slot.startDate).atZone(ZoneId.systemDefault()).toLocalDateTime()
+    }.toSet()
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/AvailabilitySheet.kt b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/AvailabilitySheet.kt
index ec634d3..a07174c 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/AvailabilitySheet.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/AvailabilitySheet.kt
@@ -28,6 +28,8 @@ fun AvailabilitySheet(
             title = uiState.title,
             subtitle = uiState.subtitle,
             gridSelectionType = uiState.gridSelectionType,
+            availableAvailabilities = uiState.overlapTimes,
+            onEditAvailabilityClicked = uiState.onEditAvailability,
             setProposalTime = availabilitySheetViewModel::setProposalTime
         )
 
diff --git a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/AvailabilitySheetViewModel.kt b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/AvailabilitySheetViewModel.kt
index d05bb76..ccd071a 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/AvailabilitySheetViewModel.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/AvailabilitySheetViewModel.kt
@@ -37,7 +37,9 @@ class AvailabilitySheetViewModel @Inject constructor(
         val initialAvailabilities: List<LocalDateTime>,
         val textButtonState: ResellTextButtonState = ResellTextButtonState.ENABLED,
         val gridSelectionType: GridSelectionType,
-        val proposedTime: LocalDateTime? = null
+        val proposedTime: LocalDateTime? = null,
+        val overlapTimes: List<LocalDateTime>? = null,
+        val onEditAvailability: (() -> Unit)? = null,
     )
 
     fun onAvailabilityChanged(availability: List<LocalDateTime>) {
@@ -80,7 +82,9 @@ class AvailabilitySheetViewModel @Inject constructor(
                     callback = uiEvent.payload.callback,
                     initialAvailabilities = uiEvent.payload.initialTimes,
                     textButtonState = uiEvent.payload.initialButtonState,
-                    gridSelectionType = uiEvent.payload.gridSelectionType
+                    gridSelectionType = uiEvent.payload.gridSelectionType,
+                    overlapTimes = uiEvent.payload.overlapTimes,
+                    onEditAvailability = uiEvent.payload.onEditAvailability
                 )
             }
         }
diff --git a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/SelectableAvailabilityPager.kt b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/SelectableAvailabilityPager.kt
index 8c338ba..115cce1 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/SelectableAvailabilityPager.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/SelectableAvailabilityPager.kt
@@ -23,9 +23,11 @@ fun SelectableAvailabilityPager(
     title: String,
     subtitle: String,
     initialSelectedAvailabilities: List<LocalDateTime> = emptyList(),
+    availableAvailabilities: List<LocalDateTime>? = null,
     scrollRange: Pair<Int, Int> = 0 to 6,
     modifier: Modifier = Modifier,
     gridSelectionType: GridSelectionType,
+    onEditAvailabilityClicked: (() -> Unit)? = null,
     setProposalTime: (LocalDateTime) -> Unit,
     setSelectedAvailabilities: (List<LocalDateTime>) -> Unit,
 ) {
@@ -65,6 +67,7 @@ fun SelectableAvailabilityPager(
         modifier = modifier,
         title = title,
         subtitle = subtitle,
+        onEditAvailabilityClicked = onEditAvailabilityClicked,
     ) { dates, page ->
         SelectableAvailabilityGrid(
             dates = dates,
@@ -81,6 +84,7 @@ fun SelectableAvailabilityPager(
                 setSelectedAvailabilities(updatedDates.values.flatten())
             },
             gridSelectionType = gridSelectionType,
+            availableAvailabilities = availableAvailabilities,
             onProposalSelected = setProposalTime
         )
     }
diff --git a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/AvailabilityPagerContainer.kt b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/AvailabilityPagerContainer.kt
index 5bc0175..205c376 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/AvailabilityPagerContainer.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/AvailabilityPagerContainer.kt
@@ -23,6 +23,7 @@ import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.unit.dp
 import com.cornellappdev.resell.android.R
+import com.cornellappdev.resell.android.ui.theme.ResellPurple
 import com.cornellappdev.resell.android.ui.theme.Secondary
 import com.cornellappdev.resell.android.ui.theme.Style
 import com.cornellappdev.resell.android.util.clickableNoIndication
@@ -45,6 +46,7 @@ fun AvailabilityPagerContainer(
     startDate: LocalDate,
     scrollRange: Pair<Int, Int>,
     modifier: Modifier = Modifier,
+    onEditAvailabilityClicked: (() -> Unit)? = null,
     availabilityGrid: @Composable (dates: List<LocalDate>, page: Int) -> Unit,
 ) {
     val state =
@@ -85,11 +87,26 @@ fun AvailabilityPagerContainer(
                 horizontalAlignment = Alignment.CenterHorizontally
             ) {
                 Text(text = title, style = Style.heading3)
-                Text(
-                    text = subtitle,
-                    style = Style.body2,
-                    color = Secondary
-                )
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Text(
+                        text = subtitle,
+                        style = Style.body2,
+                        color = Secondary
+                    )
+                    if (onEditAvailabilityClicked != null) {
+                        Text(
+                            text = " | ",
+                            style = Style.body2,
+                            color = Secondary
+                        )
+                        Text(
+                            text = "Edit Availability",
+                            style = Style.body2,
+                            color = ResellPurple,
+                            modifier = Modifier.clickableNoIndication { onEditAvailabilityClicked() }
+                        )
+                    }
+                }
             }
             Icon(
                 painter = painterResource(R.drawable.ic_chevron_right),
diff --git a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/AvailabilityUtil.kt b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/AvailabilityUtil.kt
index def4913..5edf94c 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/AvailabilityUtil.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/AvailabilityUtil.kt
@@ -9,6 +9,7 @@ import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import com.cornellappdev.resell.android.ui.theme.ResellPurple
 import com.cornellappdev.resell.android.ui.theme.Stroke
+import com.cornellappdev.resell.android.ui.theme.Wash
 import com.cornellappdev.resell.android.util.day
 import java.time.LocalDate
 import java.time.LocalDateTime
@@ -89,6 +90,27 @@ fun List<LocalDateTime>.mapToGrid(dates: List<LocalDate>): List<BooleanArray> {
     return grid
 }
 
+/**
+ * Greys out every cell where [unavailableGrid] is true, so only cells left white/normal
+ * represent times available to both parties.
+ */
+fun DrawScope.drawUnavailableCells(unavailableGrid: List<BooleanArray>, rectWidth: Float, rectHeight: Float) {
+    for (row in unavailableGrid.indices) {
+        for (col in unavailableGrid[row].indices) {
+            if (unavailableGrid[row][col]) {
+                val position = Offset(rectWidth * col, rectHeight * row)
+
+                drawRect(
+                    size = Size(rectWidth, rectHeight),
+                    topLeft = position,
+                    color = Wash,
+                    style = Fill
+                )
+            }
+        }
+    }
+}
+
 fun DrawScope.drawBorder(grid: List<BooleanArray>, rectWidth: Float, rectHeight: Float) {
     for (row in grid.indices.filter { it % 2 == 0 }) {
         for (col in grid[row].indices) {
diff --git a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/SelectableAvailabilityGrid.kt b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/SelectableAvailabilityGrid.kt
index ca941d2..603cd29 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/SelectableAvailabilityGrid.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/ui/components/availability/helper/SelectableAvailabilityGrid.kt
@@ -44,6 +44,7 @@ private fun SelectableGrid(
     updateGrid: ((List<BooleanArray>) -> List<BooleanArray>) -> Unit,
     gridSelectionType: GridSelectionType,
     modifier: Modifier = Modifier,
+    unavailableGrid: List<BooleanArray>? = null,
     onProposalSelected: (Pair<Int, Int>) -> Unit
 ) {
     var isRemoving by remember { mutableStateOf(false) }
@@ -160,6 +161,9 @@ private fun SelectableGrid(
          * in.
          */
 
+        // Grey out cells not available to both parties, before the border/selection layers.
+        unavailableGrid?.let { drawUnavailableCells(it, rectWidth, rectHeight) }
+
         // Draw border
         drawBorder(grid, rectWidth, rectHeight)
 
@@ -216,9 +220,18 @@ fun SelectableAvailabilityGrid(
     setSelectedAvailabilities: (List<LocalDateTime>) -> Unit,
     gridSelectionType: GridSelectionType,
     modifier: Modifier = Modifier,
+    /**
+     * When non-null, cells NOT in this list are greyed out — e.g. the intersection of two
+     * people's saved availability, so only times that work for both are shown as normal/white.
+     * Null means the greying feature isn't used for this grid.
+     */
+    availableAvailabilities: List<LocalDateTime>? = null,
     onProposalSelected: (LocalDateTime) -> Unit,
 ) {
     val grid = selectedAvailabilities.mapToGrid(dates)
+    val unavailableGrid = availableAvailabilities?.mapToGrid(dates)?.map { row ->
+        BooleanArray(row.size) { col -> !row[col] }
+    }
 
     AvailabilityGridContainer(dates, modifier) {
         SelectableGrid(
@@ -228,6 +241,7 @@ fun SelectableAvailabilityGrid(
                 setSelectedAvailabilities(newGrid.toAvailabilities(dates))
             },
             gridSelectionType = gridSelectionType,
+            unavailableGrid = unavailableGrid,
             onProposalSelected = {
                 val (row, col) = it
                 onProposalSelected(rowColToLocalDateTime(row, col, dates))
diff --git a/app/src/main/java/com/cornellappdev/resell/android/ui/screens/main/AvailabilityScreen.kt b/app/src/main/java/com/cornellappdev/resell/android/ui/screens/main/AvailabilityScreen.kt
index d6481e1..1900eb5 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/ui/screens/main/AvailabilityScreen.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/ui/screens/main/AvailabilityScreen.kt
@@ -77,6 +77,7 @@ fun AvailabilityScreen(
         onSetCurrentMonth = { availabilityViewModel.setCurrentMonth(it) },
         onSetVisibleDates = { availabilityViewModel.setVisibleDates(it) },
         onSave = { availabilityViewModel.saveAvailability() },
+        onBackPressed = { availabilityViewModel.onBackPressed() },
     )
 }
 
@@ -87,6 +88,7 @@ fun AvailabilityScreenContent(
     onSetCurrentMonth: (YearMonth) -> Unit,
     onSetVisibleDates: (List<LocalDate>) -> Unit,
     onSave: () -> Unit,
+    onBackPressed: () -> Unit = {},
 ) {
     // just some UI logic to allow for smooth transitions between panels expanding on the screen.
     var activePanel by remember { mutableStateOf(AvailabilityPanel.NONE) }
@@ -110,6 +112,7 @@ fun AvailabilityScreenContent(
             ResellHeader(
                 title = "Availability",
                 leftPainter = R.drawable.ic_chevron_left,
+                onLeftClick = onBackPressed,
             )
             Column(
                 modifier = Modifier
@@ -253,5 +256,6 @@ fun AvailabilityScreenPreview() {
         onSetCurrentMonth = {},
         onSetVisibleDates = {},
         onSave = {},
+        onBackPressed = {},
     )
 }
diff --git a/app/src/main/java/com/cornellappdev/resell/android/ui/screens/root/RootNavigation.kt b/app/src/main/java/com/cornellappdev/resell/android/ui/screens/root/RootNavigation.kt
index 6907644..72c9850 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/ui/screens/root/RootNavigation.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/ui/screens/root/RootNavigation.kt
@@ -25,6 +25,7 @@ import com.cornellappdev.resell.android.ui.components.submitted.ConfettiOverlay
 import com.cornellappdev.resell.android.ui.screens.externalprofile.ExternalProfileNavigation
 import com.cornellappdev.resell.android.ui.screens.feedback.FeedbackNavigation
 import com.cornellappdev.resell.android.ui.screens.main.AllSearchScreen
+import com.cornellappdev.resell.android.ui.screens.main.AvailabilityScreen
 import com.cornellappdev.resell.android.ui.screens.main.ChatScreen
 import com.cornellappdev.resell.android.ui.screens.main.MainTabNavigation
 import com.cornellappdev.resell.android.ui.screens.main.NotificationsHubScreen
@@ -179,6 +180,10 @@ fun RootNavigation(
         composable<ResellRootRoute.NOTIFS> {
             NotificationsHubScreen()
         }
+
+        composable<ResellRootRoute.AVAILABILITY> {
+            AvailabilityScreen()
+        }
     }
 
     RootConfirmationOverlay()
@@ -281,4 +286,7 @@ sealed class ResellRootRoute {
 
     @Serializable
     data object NOTIFS : ResellRootRoute()
+
+    @Serializable
+    data object AVAILABILITY : ResellRootRoute()
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/AvailabilityViewModel.kt b/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/AvailabilityViewModel.kt
index 4996243..00b7b47 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/AvailabilityViewModel.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/AvailabilityViewModel.kt
@@ -2,21 +2,20 @@ package com.cornellappdev.resell.android.viewmodel.main
 
 import androidx.lifecycle.viewModelScope
 import com.cornellappdev.resell.android.model.profile.AvailabilityRepository
-import com.cornellappdev.resell.android.model.api.UserAvailability
 import com.cornellappdev.resell.android.ui.components.availability.helper.dayGroupContaining
 import com.cornellappdev.resell.android.viewmodel.ResellViewModel
+import com.cornellappdev.resell.android.viewmodel.navigation.RootNavigationRepository
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.launch
-import java.time.Instant
 import java.time.LocalDate
 import java.time.LocalDateTime
 import java.time.YearMonth
-import java.time.ZoneId
 import javax.inject.Inject
 
 @HiltViewModel
 class AvailabilityViewModel @Inject constructor(
-    private val availabilityRepository: AvailabilityRepository
+    private val availabilityRepository: AvailabilityRepository,
+    private val rootNavigationRepository: RootNavigationRepository
 ) : ResellViewModel<AvailabilityViewModel.AvailabilityUiState>(
     initialUiState = AvailabilityUiState()
 ) {
@@ -24,7 +23,7 @@ class AvailabilityViewModel @Inject constructor(
     data class AvailabilityUiState(
         val selectedAvailabilities: Set<LocalDateTime> = emptySet(),
         val currentMonth: YearMonth = YearMonth.now(),
-        val visibleDates: List<LocalDate> = dayGroupContaining(YearMonth.now().atDay(1)),
+        val visibleDates: List<LocalDate> = dayGroupContaining(LocalDate.now()),
 
         // TODO: googleCalendarEnabled and availabilitySharingEnabled are not yet wired in.
         //  Need to check how/where it is in the backend
@@ -44,6 +43,10 @@ class AvailabilityViewModel @Inject constructor(
         loadAvailability()
     }
 
+    fun onBackPressed() {
+        rootNavigationRepository.popBackStack()
+    }
+
     // grid interactions
 
     /**
@@ -91,7 +94,7 @@ class AvailabilityViewModel @Inject constructor(
                 val availability = availabilityRepository.getMyAvailability()
                 applyMutation {
                     copy(
-                        selectedAvailabilities = availability.toLocalDateTimes(),
+                        selectedAvailabilities = availability,
                         isLoading = false,
                         errorMessage = null
                     )
@@ -113,18 +116,4 @@ class AvailabilityViewModel @Inject constructor(
             }
         }
     }
-}
-
-/**
- * Converts the backend schedule (Map<dateString, List<AvailabilitySlot>>) back into
- * a flat list of LocalDateTimes for the grid to consume.
- * Each slot's startDate is used as the representative time for a cell.
- *
- * The backend sends startDate as a UTC instant (e.g. "2026-01-23T16:00:00.000Z"), so it's
- * parsed as an [Instant] and converted to the device's local wall-clock time.
- */
-private fun UserAvailability.toLocalDateTimes(): Set<LocalDateTime> {
-    return schedule.values.flatten().map { slot ->
-        Instant.parse(slot.startDate).atZone(ZoneId.systemDefault()).toLocalDateTime()
-    }.toSet()
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/ChatViewModel.kt b/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/ChatViewModel.kt
index 71fb8ae..6d7add7 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/ChatViewModel.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/ChatViewModel.kt
@@ -23,7 +23,6 @@ import com.cornellappdev.resell.android.model.Chat
 import com.cornellappdev.resell.android.model.ChatMessageData
 import com.cornellappdev.resell.android.model.api.ChatRepository
 import com.cornellappdev.resell.android.model.api.Post
-import com.cornellappdev.resell.android.model.chats.AvailabilityBlock
 import com.cornellappdev.resell.android.model.chats.AvailabilityDocument
 import com.cornellappdev.resell.android.model.chats.MeetingInfo
 import com.cornellappdev.resell.android.model.chats.TransactionInfo
@@ -33,6 +32,7 @@ import com.cornellappdev.resell.android.model.classes.ResellApiResponse
 import com.cornellappdev.resell.android.model.core.UserInfoRepository
 import com.cornellappdev.resell.android.model.login.FireStoreRepository
 import com.cornellappdev.resell.android.model.login.FirebaseMessagingRepository
+import com.cornellappdev.resell.android.model.profile.AvailabilityRepository
 import com.cornellappdev.resell.android.model.ptf.PostTransactionRatingRepository
 import com.cornellappdev.resell.android.ui.components.availability.helper.GridSelectionType
 import com.cornellappdev.resell.android.ui.components.global.ResellTextButtonContainer
@@ -41,7 +41,6 @@ import com.cornellappdev.resell.android.ui.screens.root.ResellRootRoute
 import com.cornellappdev.resell.android.ui.theme.Style
 import com.cornellappdev.resell.android.ui.theme.Style.heading3
 import com.cornellappdev.resell.android.util.UIEvent
-import com.cornellappdev.resell.android.util.convertToFirestoreTimestamp
 import com.cornellappdev.resell.android.util.loadBitmapFromUri
 import com.cornellappdev.resell.android.util.toNetworkingString
 import com.cornellappdev.resell.android.viewmodel.ResellViewModel
@@ -74,6 +73,7 @@ class ChatViewModel @Inject constructor(
     private val rootDialogRepository: RootDialogRepository,
     private val rootNavigationRepository: RootNavigationRepository,
     private val postTransactionRatingRepository: PostTransactionRatingRepository,
+    private val availabilityRepository: AvailabilityRepository,
     @ApplicationContext private val context: Context
 ) :
     ResellViewModel<ChatViewModel.MessagesUiState>(
@@ -247,48 +247,49 @@ class ChatViewModel @Inject constructor(
     }
 
     fun onSendAvailabilityPressed() {
-        rootNavigationSheetRepository.showBottomSheet(
-            sheet = RootSheet.Availability(
-                title = "When are you free to meet?",
-                buttonString = "Continue",
-                description = "Drag across the grid to add/remove availability",
-                callback = ::availabilityCallback,
-                gridSelectionType = GridSelectionType.AVAILABILITY
-            )
-        )
-    }
+        val canPropose = mostRecentMeetingStateIs("confirmed") == null
 
-    private fun availabilityCallback(availability: List<LocalDateTime>) {
         viewModelScope.launch {
-            try {
-                val myInfo = userInfoRepository.getUserInfo()
-
-                val asTimeStamp = availability.map {
-                    it.convertToFirestoreTimestamp()
+            // Grey out everything but the overlap between both people's saved availability, so
+            // the proposer only sees times that could actually work for both of them. If either
+            // side hasn't saved availability (or the fetch fails), fall back to an ungreyed grid.
+            val overlapTimes = try {
+                val myId = userInfoRepository.getUserId()
+                if (myId == null) {
+                    null
+                } else {
+                    val mine = availabilityRepository.getMyAvailability()
+                    val theirs = availabilityRepository.getUserAvailability(navArgs.otherUserId)
+                    mine.intersect(theirs).toList()
                 }
+            } catch (e: Exception) {
+                Log.e("ChatViewModel", "Error loading combined availability: ", e)
+                null
+            }
 
-                chatRepository.sendAvailability(
-                    selfIsBuyer = navArgs.isBuyer,
-                    listingId = listing.id,
-                    myId = myInfo.id,
-                    otherId = navArgs.otherUserId,
-                    availability = AvailabilityDocument(
-                        asTimeStamp.mapIndexed { index, it ->
-                            AvailabilityBlock(
-                                startDate = it,
-                                id = index
+            rootNavigationSheetRepository.showBottomSheet(
+                sheet = RootSheet.Availability(
+                    title = "When are you free to meet?",
+                    buttonString = "Propose",
+                    description = "Select a 30 minute block",
+                    initialButtonState = ResellTextButtonState.DISABLED,
+                    callback = {
+                        if (canPropose && it.isNotEmpty()) {
+                            onMeetingProposal(it.first())
+                        } else {
+                            rootConfirmationRepository.showError(
+                                "Please select a 30-minute block to propose a meeting, and ensure there is no current meeting."
                             )
                         }
-                    ),
-                    chatId = navArgs.chatId
-                )
-                rootNavigationSheetRepository.hideSheet()
-            } catch (e: Exception) {
-                Log.e("ChatViewModel", "Error sending availability: ", e)
-                rootConfirmationRepository.showError(
-                    "Something went wrong while sending your availability. Please try again later."
+                    },
+                    gridSelectionType = if (canPropose) GridSelectionType.PROPOSAL else GridSelectionType.NONE,
+                    overlapTimes = overlapTimes,
+                    onEditAvailability = {
+                        rootNavigationSheetRepository.hideSheet()
+                        rootNavigationRepository.navigate(ResellRootRoute.AVAILABILITY)
+                    }
                 )
-            }
+            )
         }
     }
 
diff --git a/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/ProfileViewModel.kt b/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/ProfileViewModel.kt
index ce0ebf1..e8da8d6 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/ProfileViewModel.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/viewmodel/main/ProfileViewModel.kt
@@ -10,7 +10,6 @@ import com.cornellappdev.resell.android.model.core.UserInfoRepository
 import com.cornellappdev.resell.android.model.login.GoogleAuthRepository
 import com.cornellappdev.resell.android.model.profile.ProfileRepository
 import com.cornellappdev.resell.android.model.settings.BlockedUsersRepository
-import com.cornellappdev.resell.android.ui.components.availability.helper.GridSelectionType
 import com.cornellappdev.resell.android.ui.components.global.ResellTextButtonContainer
 import com.cornellappdev.resell.android.ui.components.global.ResellTextButtonState
 import com.cornellappdev.resell.android.ui.screens.root.ResellRootRoute
@@ -19,9 +18,7 @@ import com.cornellappdev.resell.android.viewmodel.navigation.RootNavigationRepos
 import com.cornellappdev.resell.android.viewmodel.root.RootConfirmationRepository
 import com.cornellappdev.resell.android.viewmodel.root.RootDialogContent
 import com.cornellappdev.resell.android.viewmodel.root.RootDialogRepository
-import com.cornellappdev.resell.android.viewmodel.root.RootNavigationSheetRepository
 import com.cornellappdev.resell.android.viewmodel.root.RootOptionsMenuRepository
-import com.cornellappdev.resell.android.viewmodel.root.RootSheet
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.launch
 import kotlinx.serialization.encodeToString
@@ -35,7 +32,6 @@ class ProfileViewModel @Inject constructor(
     private val rootConfirmationRepository: RootConfirmationRepository,
     private val profileRepository: ProfileRepository,
     private val userInfoRepository: UserInfoRepository,
-    private val rootNavigationSheetRepository: RootNavigationSheetRepository // add this
 ): ResellViewModel<ProfileViewModel.ProfileUiState>(
     initialUiState = ProfileUiState(
         profileTab = ProfileTab.SHOP,
@@ -91,16 +87,7 @@ class ProfileViewModel @Inject constructor(
         rootNavigationRepository.navigate(ResellRootRoute.SETTINGS)
     }
     fun onCalendarPressed() {
-        rootNavigationSheetRepository.showBottomSheet(
-            RootSheet.Availability(
-                buttonString = "Propose",
-                title = "Availability",
-                description = "Propose a time to meet",
-                initialTimes = listOf(),
-                gridSelectionType = GridSelectionType.PROPOSAL,
-                callback = { /* TODO: handle selected times */ }
-            )
-        )
+        rootNavigationRepository.navigate(ResellRootRoute.AVAILABILITY)
     }
 
     fun onRequestPressed(request: RequestListing) {
diff --git a/app/src/main/java/com/cornellappdev/resell/android/viewmodel/root/RootSheetRepository.kt b/app/src/main/java/com/cornellappdev/resell/android/viewmodel/root/RootSheetRepository.kt
index b9b591d..75529b8 100644
--- a/app/src/main/java/com/cornellappdev/resell/android/viewmodel/root/RootSheetRepository.kt
+++ b/app/src/main/java/com/cornellappdev/resell/android/viewmodel/root/RootSheetRepository.kt
@@ -72,7 +72,15 @@ sealed class RootSheet {
         val title: String,
         val description: String,
         val callback: (List<LocalDateTime>) -> Unit,
-        val gridSelectionType: GridSelectionType
+        val gridSelectionType: GridSelectionType,
+        /**
+         * When non-null, cells NOT in this list are greyed out on the grid — e.g. the
+         * intersection of both chat participants' saved availability, so only times that
+         * work for both show as normal/white. Null means this feature isn't used.
+         */
+        val overlapTimes: List<LocalDateTime>? = null,
+        /** When non-null, shows an "Edit Availability" link next to the description. */
+        val onEditAvailability: (() -> Unit)? = null,
     ) : RootSheet()
 
     data class MeetingCancel(