diff --git a/profile/src/test/java/org/openedx/profile/presentation/profile/CalendarViewModelTest.kt b/profile/src/test/java/org/openedx/profile/presentation/profile/CalendarViewModelTest.kt
new file mode 100644
index 000000000..3cc8f1da2
--- /dev/null
+++ b/profile/src/test/java/org/openedx/profile/presentation/profile/CalendarViewModelTest.kt
@@ -0,0 +1,157 @@
+package org.openedx.profile.presentation.profile
+
+import androidx.activity.result.ActivityResultLauncher
+import androidx.fragment.app.FragmentManager
+import io.mockk.coVerify
+import io.mockk.every
+import io.mockk.mockk
+import junit.framework.TestCase.assertEquals
+import junit.framework.TestCase.assertTrue
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.resetMain
+import kotlinx.coroutines.test.runTest
+import kotlinx.coroutines.test.setMain
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.openedx.core.data.storage.CalendarPreferences
+import org.openedx.core.data.storage.CorePreferences
+import org.openedx.core.domain.interactor.CalendarInteractor
+import org.openedx.core.presentation.settings.calendarsync.CalendarSyncState
+import org.openedx.core.system.CalendarManager
+import org.openedx.core.system.connection.NetworkConnection
+import org.openedx.core.system.notifier.calendar.CalendarCreated
+import org.openedx.core.system.notifier.calendar.CalendarNotifier
+import org.openedx.core.system.notifier.calendar.CalendarSynced
+import org.openedx.core.worker.CalendarSyncScheduler
+import org.openedx.profile.presentation.ProfileRouter
+import org.openedx.profile.presentation.calendar.CalendarViewModel
+
+@OptIn(ExperimentalCoroutinesApi::class)
+class CalendarViewModelTest {
+
+    private val dispatcher = StandardTestDispatcher()
+    private lateinit var viewModel: CalendarViewModel
+
+    private val calendarSyncScheduler = mockk<CalendarSyncScheduler>(relaxed = true)
+    private val calendarManager = mockk<CalendarManager>(relaxed = true)
+    private val calendarPreferences = mockk<CalendarPreferences>(relaxed = true)
+    private val calendarNotifier = mockk<CalendarNotifier>(relaxed = true)
+    private val calendarInteractor = mockk<CalendarInteractor>(relaxed = true)
+    private val corePreferences = mockk<CorePreferences>(relaxed = true)
+    private val profileRouter = mockk<ProfileRouter>(relaxed = true)
+    private val networkConnection = mockk<NetworkConnection>(relaxed = true)
+    private val permissionLauncher = mockk<ActivityResultLauncher<Array<String>>>(relaxed = true)
+    private val fragmentManager = mockk<FragmentManager>(relaxed = true)
+
+    @Before
+    fun setup() {
+        Dispatchers.setMain(dispatcher)
+        every { networkConnection.isOnline() } returns true
+        viewModel = CalendarViewModel(
+            calendarSyncScheduler = calendarSyncScheduler,
+            calendarManager = calendarManager,
+            calendarPreferences = calendarPreferences,
+            calendarNotifier = calendarNotifier,
+            calendarInteractor = calendarInteractor,
+            corePreferences = corePreferences,
+            profileRouter = profileRouter,
+            networkConnection = networkConnection
+        )
+    }
+
+    @After
+    fun tearDown() {
+        Dispatchers.resetMain()
+    }
+
+    @Test
+    fun `init triggers immediate sync and loads calendar data`() = runTest(dispatcher) {
+        coVerify { calendarSyncScheduler.requestImmediateSync() }
+        coVerify { calendarInteractor.getAllCourseCalendarStateFromCache() }
+    }
+
+    @Test
+    fun `setUpCalendarSync launches permission request`() = runTest(dispatcher) {
+        viewModel.setUpCalendarSync(permissionLauncher)
+        coVerify { permissionLauncher.launch(calendarManager.permissions) }
+    }
+
+    @Test
+    fun `setCalendarSyncEnabled enables sync and triggers sync when isEnabled is true`() = runTest(dispatcher) {
+        viewModel.setCalendarSyncEnabled(isEnabled = true, fragmentManager = fragmentManager)
+
+        coVerify {
+            calendarPreferences.isCalendarSyncEnabled = true
+            calendarSyncScheduler.requestImmediateSync()
+        }
+        assertTrue(viewModel.uiState.value.isCalendarSyncEnabled)
+    }
+
+    @Test
+    fun `setRelativeDateEnabled updates preference and UI state`() = runTest(dispatcher) {
+        viewModel.setRelativeDateEnabled(true)
+
+        coVerify { corePreferences.isRelativeDatesEnabled = true }
+        assertTrue(viewModel.uiState.value.isRelativeDateEnabled)
+    }
+
+    @Test
+    fun `network disconnection changes sync state to offline`() = runTest(dispatcher) {
+        every { networkConnection.isOnline() } returns false
+        viewModel = CalendarViewModel(
+            calendarSyncScheduler,
+            calendarManager,
+            calendarPreferences,
+            calendarNotifier,
+            calendarInteractor,
+            corePreferences,
+            profileRouter,
+            networkConnection
+        )
+
+        assertEquals(CalendarSyncState.OFFLINE, viewModel.uiState.value.calendarSyncState)
+    }
+
+    @Test
+    fun `successful calendar sync updates sync state to SYNCED`() = runTest(dispatcher) {
+        viewModel = CalendarViewModel(
+            calendarSyncScheduler,
+            calendarManager,
+            calendarPreferences,
+            calendarNotifier.apply {
+                every { notifier } returns flowOf(CalendarSynced)
+            },
+            calendarInteractor,
+            corePreferences,
+            profileRouter,
+            networkConnection
+        )
+
+        assertEquals(CalendarSyncState.SYNCED, viewModel.uiState.value.calendarSyncState)
+    }
+
+    @Test
+    fun `calendar creation updates calendar existence state`() = runTest(dispatcher) {
+        every { calendarPreferences.calendarId } returns 1
+        every { calendarManager.isCalendarExist(1) } returns true
+
+        viewModel = CalendarViewModel(
+            calendarSyncScheduler,
+            calendarManager,
+            calendarPreferences,
+            calendarNotifier.apply {
+                every { notifier } returns flowOf(CalendarCreated)
+            },
+            calendarInteractor,
+            corePreferences,
+            profileRouter,
+            networkConnection
+        )
+
+        assertTrue(viewModel.uiState.value.isCalendarExist)
+    }
+}