diff --git a/CHANGELOG.md b/CHANGELOG.md
index 70246d74f..911aa1c0d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,7 @@
 Change Log
 ---
 =======
-### 10.5 (2020-10-19)
+### 10.5 (2020-10-21)
 
 * Multi-select rescheduling
 * New task default settings
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index cf4ecd242..cf843abb5 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -44,7 +44,7 @@ android {
     defaultConfig {
         testApplicationId = "org.tasks.test"
         applicationId = "org.tasks"
-        versionCode = 100500
+        versionCode = 100501
         versionName = "10.5"
         targetSdkVersion(Versions.targetSdk)
         minSdkVersion(Versions.minSdk)
diff --git a/app/src/main/java/com/todoroo/astrid/dao/TaskDao.kt b/app/src/main/java/com/todoroo/astrid/dao/TaskDao.kt
index 3eb4a5c08..b9b3504fc 100644
--- a/app/src/main/java/com/todoroo/astrid/dao/TaskDao.kt
+++ b/app/src/main/java/com/todoroo/astrid/dao/TaskDao.kt
@@ -67,6 +67,8 @@ class TaskDao @Inject constructor(
 
     suspend fun setParent(parent: Long, tasks: List<Long>) = taskDao.setParent(parent, tasks)
 
+    suspend fun getChildren(ids: List<Long>) = taskDao.getChildren(ids)
+
     suspend fun getChildren(id: Long): List<Long> = taskDao.getChildren(id)
 
     suspend fun setCollapsed(id: Long, collapsed: Boolean) = taskDao.setCollapsed(id, collapsed)
diff --git a/app/src/main/java/com/todoroo/astrid/service/TaskDuplicator.kt b/app/src/main/java/com/todoroo/astrid/service/TaskDuplicator.kt
index 8b52fc89d..0fbfd743b 100644
--- a/app/src/main/java/com/todoroo/astrid/service/TaskDuplicator.kt
+++ b/app/src/main/java/com/todoroo/astrid/service/TaskDuplicator.kt
@@ -7,6 +7,7 @@ import com.todoroo.astrid.data.Task
 import com.todoroo.astrid.gcal.GCalHelper
 import org.tasks.LocalBroadcastManager
 import org.tasks.data.*
+import org.tasks.db.DbUtils.dbchunk
 import org.tasks.preferences.Preferences
 import java.util.*
 import javax.inject.Inject
@@ -25,7 +26,12 @@ class TaskDuplicator @Inject constructor(
 
     suspend fun duplicate(taskIds: List<Long>): List<Task> {
         val result: MutableList<Task> = ArrayList()
-        for (task in taskDao.fetch(taskIds)) {
+        val tasks = ArrayList(taskIds)
+        taskIds.dbchunk().forEach {
+            tasks.removeAll(googleTaskDao.getChildren(it))
+            tasks.removeAll(taskDao.getChildren(it))
+        }
+        for (task in taskDao.fetch(tasks)) {
             result.add(clone(task))
         }
         localBroadcastManager.broadcastRefresh()
diff --git a/app/src/main/java/org/tasks/dialogs/DateTimePicker.kt b/app/src/main/java/org/tasks/dialogs/DateTimePicker.kt
index f75c17dc1..fa076518d 100644
--- a/app/src/main/java/org/tasks/dialogs/DateTimePicker.kt
+++ b/app/src/main/java/org/tasks/dialogs/DateTimePicker.kt
@@ -87,8 +87,8 @@ class DateTimePicker : BottomSheetDialogFragment() {
             bundle.putLongArray(EXTRA_TASKS, tasks.map { it.id }.toLongArray())
             val dueDates = tasks.map { it.dueDate.startOfDay() }.toSet()
             val dueTimes = tasks.map { it.dueDate.millisOfDay() }.toSet()
-            bundle.putLong(EXTRA_DAY, if (dueDates.size == 1) dueDates.first() else -1)
-            bundle.putInt(EXTRA_TIME, if (dueTimes.size == 1) dueTimes.first() else -1)
+            bundle.putLong(EXTRA_DAY, if (dueDates.size == 1) dueDates.first() else MULTIPLE_DAYS)
+            bundle.putInt(EXTRA_TIME, if (dueTimes.size == 1) dueTimes.first() else MULTIPLE_TIMES)
             bundle.putBoolean(EXTRA_AUTO_CLOSE, autoClose)
             val fragment = DateTimePicker()
             fragment.arguments = bundle
@@ -129,7 +129,11 @@ class DateTimePicker : BottomSheetDialogFragment() {
             binding.calendarView.firstDayOfWeek = firstDayOfWeek
         }
         selectedDay = savedInstanceState?.getLong(EXTRA_DAY) ?: requireArguments().getLong(EXTRA_DAY)
-        selectedTime = savedInstanceState?.getInt(EXTRA_TIME) ?: requireArguments().getInt(EXTRA_TIME)
+        selectedTime =
+                savedInstanceState?.getInt(EXTRA_TIME)
+                        ?: requireArguments().getInt(EXTRA_TIME)
+                                .takeIf { it == MULTIPLE_TIMES || Task.hasDueTime(it.toLong()) }
+                                ?: NO_TIME
 
         return binding.root
     }
@@ -275,14 +279,26 @@ class DateTimePicker : BottomSheetDialogFragment() {
                     taskDao
                             .fetch(taskIds.toList())
                             .forEach {
+                                val day = if (selectedDay == MULTIPLE_DAYS) {
+                                    if (it.hasDueDate()) it.dueDate else today.millis
+                                } else {
+                                    selectedDay
+                                }
+                                val time = if (selectedTime == MULTIPLE_TIMES) {
+                                    if (it.hasDueTime()) it.dueDate.millisOfDay() else NO_TIME
+                                } else {
+                                    selectedTime
+                                }
                                 it.setDueDateAdjustingHideUntil(when {
-                                    selectedDay == MULTIPLE_DAYS ->
-                                        it.dueDate.toDateTime().withMillisOfDay(selectedTime).millis
-                                    selectedDay == NO_DAY -> 0L
-                                    selectedTime == MULTIPLE_TIMES ->
-                                        selectedDay.toDateTime().withMillisOfDay(it.dueDate.millisOfDay()).millis
-                                    selectedTime == NO_TIME -> selectedDay
-                                    else -> selectedDay.toDateTime().withMillisOfDay(selectedTime).millis
+                                    day == NO_DAY -> 0L
+                                    time == NO_TIME -> Task.createDueDate(
+                                            Task.URGENCY_SPECIFIC_DAY,
+                                            day
+                                    )
+                                    else -> Task.createDueDate(
+                                            Task.URGENCY_SPECIFIC_DAY_TIME,
+                                            day.toDateTime().withMillisOfDay(time).millis
+                                    )
                                 })
                                 taskDao.save(it)
                             }
diff --git a/fastlane/metadata/android/en-US/changelogs/100500.txt b/fastlane/metadata/android/en-US/changelogs/100501.txt
similarity index 100%
rename from fastlane/metadata/android/en-US/changelogs/100500.txt
rename to fastlane/metadata/android/en-US/changelogs/100501.txt