diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/domain/EventForm.kt b/app/src/main/java/de/jeanlucmakiola/calendula/domain/EventForm.kt
index 4ffe8b5..bbd9646 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/domain/EventForm.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/domain/EventForm.kt
@@ -162,10 +162,7 @@ fun EventDetail.toEditForm(beginMillis: Long, endMillis: Long, zone: TimeZone):
     val begin = Instant.fromEpochMilliseconds(beginMillis)
     val finish = Instant.fromEpochMilliseconds(endMillis)
     val (start, end) = if (instance.isAllDay) {
-        val startDate = begin.toLocalDateTime(TimeZone.UTC).date
-        val endExclusive = finish.toLocalDateTime(TimeZone.UTC).date
-        val endDate = maxOf(startDate, LocalDate.fromEpochDays(endExclusive.toEpochDays() - 1))
-        FormTime(LocalDateTime(startDate, LocalTime(9, 0))) to FormTime(LocalDateTime(endDate, LocalTime(10, 0)))
+        allDayFormTimes(begin.toLocalDateTime(TimeZone.UTC).date, finish.toLocalDateTime(TimeZone.UTC).date)
     } else {
         begin.toFormTime(formZone) to finish.toFormTime(formZone)
     }
@@ -181,7 +178,7 @@ fun EventDetail.toEditForm(beginMillis: Long, endMillis: Long, zone: TimeZone):
         reminders = reminders.map { it.minutes }.distinct().sorted(),
         availability = availability,
         accessLevel = accessLevel,
-        rrule = rrule?.removePrefix("RRULE:")?.takeIf { it.isNotBlank() },
+        rrule = rrule.normalizedRrule(),
         // The provider fills EVENT_COLOR from the key, so [color] is the
         // swatch either way; a null colour means the event inherits its
         // calendar's colour.
@@ -233,6 +230,19 @@ fun EventDetail.toEditSnapshot(beginMillis: Long, endMillis: Long, zone: TimeZon
         rowEnd = instance.end,
     )
 
+/**
+ * Form times for an all-day span stored as UTC midnights with an exclusive
+ * end: the last covered day (never before [start]), with placeholder
+ * wall-clock times kept in case the user switches the event to timed.
+ */
+internal fun allDayFormTimes(start: LocalDate, endExclusive: LocalDate?): Pair<FormTime, FormTime> {
+    val end = endExclusive?.let { maxOf(start, LocalDate.fromEpochDays(it.toEpochDays() - 1)) } ?: start
+    return FormTime(LocalDateTime(start, LocalTime(9, 0))) to FormTime(LocalDateTime(end, LocalTime(10, 0)))
+}
+
+/** The bare RRULE value the form edits; blank means none. */
+internal fun String?.normalizedRrule(): String? = this?.removePrefix("RRULE:")?.takeIf { it.isNotBlank() }
+
 /**
  * Whether this form's times mean something else in [target] — a timed event
  * pinned to another zone. False when there's nothing to disambiguate: an
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/domain/InsertEventForm.kt b/app/src/main/java/de/jeanlucmakiola/calendula/domain/InsertEventForm.kt
index a537275..0a6c0c1 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/domain/InsertEventForm.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/domain/InsertEventForm.kt
@@ -1,8 +1,5 @@
 package de.jeanlucmakiola.calendula.domain
 
-import kotlinx.datetime.LocalDate
-import kotlinx.datetime.LocalDateTime
-import kotlinx.datetime.LocalTime
 import kotlinx.datetime.TimeZone
 import kotlinx.datetime.toLocalDateTime
 import kotlin.time.Duration.Companion.hours
@@ -35,17 +32,11 @@ fun buildInsertEventForm(
     now: Instant,
 ): EventForm {
     val (start, end) = if (isAllDay) {
-        // All-day provider times are UTC midnights with an exclusive end; show
-        // the last covered day and keep placeholder wall-clock times in case the
-        // user switches the event to timed (mirrors EventDetail.toEditForm).
         val startDate = beginMillis
             ?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(TimeZone.UTC).date }
             ?: now.toLocalDateTime(zone).date
-        val endDate = endMillis
-            ?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(TimeZone.UTC).date }
-            ?.let { exclusive -> maxOf(startDate, LocalDate.fromEpochDays(exclusive.toEpochDays() - 1)) }
-            ?: startDate
-        FormTime(LocalDateTime(startDate, LocalTime(9, 0))) to FormTime(LocalDateTime(endDate, LocalTime(10, 0)))
+        val endExclusive = endMillis?.let { Instant.fromEpochMilliseconds(it).toLocalDateTime(TimeZone.UTC).date }
+        allDayFormTimes(startDate, endExclusive)
     } else {
         val startAt = beginMillis?.let(Instant::fromEpochMilliseconds) ?: nextFullHour(now)
         val endAt = endMillis?.let(Instant::fromEpochMilliseconds)?.takeIf { it >= startAt }
@@ -62,7 +53,7 @@ fun buildInsertEventForm(
         description = description.orEmpty(),
         // Bare RRULE value (Events.RRULE convention); tolerate a leading "RRULE:"
         // some callers include.
-        rrule = rrule?.removePrefix("RRULE:")?.takeIf { it.isNotBlank() },
+        rrule = rrule.normalizedRrule(),
     )
 }
 
diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/domain/ics/ParsedIcsForm.kt b/app/src/main/java/de/jeanlucmakiola/calendula/domain/ics/ParsedIcsForm.kt
index e8ab23b..1467e04 100644
--- a/app/src/main/java/de/jeanlucmakiola/calendula/domain/ics/ParsedIcsForm.kt
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/domain/ics/ParsedIcsForm.kt
@@ -1,11 +1,9 @@
 package de.jeanlucmakiola.calendula.domain.ics
 
 import de.jeanlucmakiola.calendula.domain.EventForm
-import de.jeanlucmakiola.calendula.domain.FormTime
+import de.jeanlucmakiola.calendula.domain.allDayFormTimes
+import de.jeanlucmakiola.calendula.domain.normalizedRrule
 import de.jeanlucmakiola.calendula.domain.toFormTime
-import kotlinx.datetime.LocalDate
-import kotlinx.datetime.LocalDateTime
-import kotlinx.datetime.LocalTime
 import kotlinx.datetime.TimeZone
 import kotlinx.datetime.toLocalDateTime
 
@@ -23,10 +21,7 @@ import kotlinx.datetime.toLocalDateTime
  */
 fun ParsedIcsEvent.toEventForm(zone: TimeZone): EventForm {
     val (start, end) = if (isAllDay) {
-        val startDate = this.start.toLocalDateTime(TimeZone.UTC).date
-        val endExclusive = this.end.toLocalDateTime(TimeZone.UTC).date
-        val endDate = maxOf(startDate, LocalDate.fromEpochDays(endExclusive.toEpochDays() - 1))
-        FormTime(LocalDateTime(startDate, LocalTime(9, 0))) to FormTime(LocalDateTime(endDate, LocalTime(10, 0)))
+        allDayFormTimes(this.start.toLocalDateTime(TimeZone.UTC).date, this.end.toLocalDateTime(TimeZone.UTC).date)
     } else {
         this.start.toFormTime(zone) to this.end.toFormTime(zone)
     }
@@ -40,6 +35,6 @@ fun ParsedIcsEvent.toEventForm(zone: TimeZone): EventForm {
         description = description.orEmpty(),
         reminders = semanticReminderMinutes(),
         availability = availability,
-        rrule = recurrenceRule?.removePrefix("RRULE:")?.takeIf { it.isNotBlank() },
+        rrule = recurrenceRule.normalizedRrule(),
     )
 }