diff --git a/CalendarCore/src/commonMain/kotlin/com/infomaniak/multiplatform_calendar/core/domain/model/event/Event.kt b/CalendarCore/src/commonMain/kotlin/com/infomaniak/multiplatform_calendar/core/domain/model/event/Event.kt
index b83d41a14..546ea3cb6 100644
--- a/CalendarCore/src/commonMain/kotlin/com/infomaniak/multiplatform_calendar/core/domain/model/event/Event.kt
+++ b/CalendarCore/src/commonMain/kotlin/com/infomaniak/multiplatform_calendar/core/domain/model/event/Event.kt
@@ -23,6 +23,7 @@ import com.infomaniak.multiplatform_calendar.core.domain.model.calendar.Calendar
 import com.infomaniak.multiplatform_calendar.core.domain.model.event.alarm.EventAlarm
 import com.infomaniak.multiplatform_calendar.core.domain.model.event.recurrence.RecurrenceScope
 import com.infomaniak.multiplatform_calendar.core.domain.model.event.recurrence.recurrenceScopesFor
+import com.infomaniak.multiplatform_calendar.core.extensions.removeMarkedBlocks
 import kotlin.experimental.ExperimentalObjCRefinement
 import kotlin.native.HiddenFromObjC
 import kotlin.time.ExperimentalTime
@@ -67,4 +68,9 @@ public data class Event(
     /** What a mutation of this event may be asked to reach, empty when there is nothing to ask. */
     val recurrenceScopes: Set<RecurrenceScope>
         get() = recurrenceScopesFor(isOccurrence, canEdit)
+
+    /** The description with all Infomaniak marked blocks removed. */
+    val cleanedDescription: String
+        get() = description?.removeMarkedBlocks() ?: ""
+
 }
diff --git a/CalendarCore/src/commonMain/kotlin/com/infomaniak/multiplatform_calendar/core/extensions/EventDescriptionExtensions.kt b/CalendarCore/src/commonMain/kotlin/com/infomaniak/multiplatform_calendar/core/extensions/EventDescriptionExtensions.kt
new file mode 100644
index 000000000..168e2417d
--- /dev/null
+++ b/CalendarCore/src/commonMain/kotlin/com/infomaniak/multiplatform_calendar/core/extensions/EventDescriptionExtensions.kt
@@ -0,0 +1,25 @@
+/*
+ * Infomaniak Calendar - Multiplatform
+ * Copyright (C) 2026 Infomaniak Network SA
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.infomaniak.multiplatform_calendar.core.extensions
+
+private const val MARKED_BLOCKS = "/\\*----------------------------------------\\*/"
+private val MARKED_BLOCKS_REGEX = Regex("$MARKED_BLOCKS[\\s\\S]*?$MARKED_BLOCKS")
+
+internal fun String.removeMarkedBlocks(): String {
+    return this.replace(MARKED_BLOCKS_REGEX, "").trim()
+}
diff --git a/CalendarCore/src/commonTest/kotlin/com/infomaniak/multiplatform_calendar/core/extensions/EventDescriptionExtensionsTest.kt b/CalendarCore/src/commonTest/kotlin/com/infomaniak/multiplatform_calendar/core/extensions/EventDescriptionExtensionsTest.kt
new file mode 100644
index 000000000..1c55d788c
--- /dev/null
+++ b/CalendarCore/src/commonTest/kotlin/com/infomaniak/multiplatform_calendar/core/extensions/EventDescriptionExtensionsTest.kt
@@ -0,0 +1,106 @@
+/*
+ * Infomaniak Calendar - Multiplatform
+ * Copyright (C) 2026 Infomaniak Network SA
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.infomaniak.multiplatform_calendar.core.extensions
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class EventDescriptionExtensionsTest {
+
+    private val marker = "/*----------------------------------------*/"
+
+    @Test
+    fun removeMarkedBlocks_removesOneBlockAndPreservesSurroundingText() {
+        val input = "before${marker}content to remove${marker}after"
+
+        assertEquals("beforeafter", input.removeMarkedBlocks())
+    }
+
+    @Test
+    fun removeMarkedBlocks_removesMultipleBlocks() {
+        val input = "before${marker}first${marker}middle${marker}second${marker}after"
+
+        assertEquals("beforemiddleafter", input.removeMarkedBlocks())
+    }
+
+    @Test
+    fun removeMarkedBlocks_removesMultilineBlockAndPreservesLineBreaksOutsideIt() {
+        val input = "before\n${marker}\nfirst line\nsecond line\n${marker}\nafter"
+
+        assertEquals("before\n\nafter", input.removeMarkedBlocks())
+    }
+
+    @Test
+    fun removeMarkedBlocks_removesSeveralMultilineBlocks() {
+        val input = "before\n${marker}\nfirst block\nspanning two lines\n${marker}\nbetween\n" +
+            "${marker}\nsecond block\nspanning two lines\n${marker}\nafter"
+
+        assertEquals("before\n\nbetween\n\nafter", input.removeMarkedBlocks())
+    }
+
+    @Test
+    fun removeMarkedBlocks_removesMultilineEmptyBlock() {
+        val input = "before\n${marker}\n${marker}\nafter"
+
+        assertEquals("before\n\nafter", input.removeMarkedBlocks())
+    }
+
+    @Test
+    fun removeMarkedBlocks_removesBlockWithEmptyContent() {
+        val input = "before${marker}${marker}after"
+
+        assertEquals("beforeafter", input.removeMarkedBlocks())
+    }
+
+    @Test
+    fun removeMarkedBlocks_removesSeveralEmptyBlocks() {
+        val input = "before${marker}${marker}${marker}${marker}after"
+
+        assertEquals("beforeafter", input.removeMarkedBlocks())
+    }
+
+    @Test
+    fun removeMarkedBlocks_removesEmptyAndNonEmptyBlocksTogether() {
+        val input = "before${marker}content${marker}${marker}${marker}after"
+
+        assertEquals("beforeafter", input.removeMarkedBlocks())
+    }
+
+    @Test
+    fun removeMarkedBlocks_returnsEmptyStringWhenOnlyAnEmptyBlockIsPresent() {
+        val input = "${marker}${marker}"
+
+        assertEquals("", input.removeMarkedBlocks())
+    }
+
+    @Test
+    fun removeMarkedBlocks_leavesTextWithoutBlocksUntouched() {
+        val input = "normal description"
+
+        assertEquals(input, input.removeMarkedBlocks())
+    }
+
+    @Test
+    fun removeMarkedBlocks_leavesUnmatchedMarkerUntouched() {
+        val input = "before${marker}content without closing marker"
+
+        assertEquals(input, input.removeMarkedBlocks())
+    }
+}
+
+