diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 2211bdda..4919ca47 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -6,6 +6,7 @@ Changelog
 - Fix #509: Fix event type visibility
 - Enh #512: Surround the widget wall entry links with a dedicated HTML class
 - Enh #516: Improved calendar page URLs
+- Fix #519: Fix issue where `IntlDateFormatter::parse()` failed to parse Bulgarian dates.
 
 1.6.4 (Unreleased)
 -----------------------
diff --git a/models/forms/CalendarEntryForm.php b/models/forms/CalendarEntryForm.php
index 9ed1b831..b0efc8fa 100644
--- a/models/forms/CalendarEntryForm.php
+++ b/models/forms/CalendarEntryForm.php
@@ -379,6 +379,9 @@ public function load($data, $formName = null)
             $this->end_time = null;
         }
 
+        $this->start_date = $this->normalizeFormattedDate($this->start_date);
+        $this->end_date = $this->normalizeFormattedDate($this->end_date);
+
         $startDT = $this->getStartDateTime();
         $endDt = $this->getEndDateTime();
 
@@ -564,4 +567,19 @@ public function getEndDateTime()
         }
         return $endDT;
     }
+
+    private function normalizeFormattedDate($formattedDate)
+    {
+        /**
+         * If the locale is 'bg' (Bulgarian), remove the 'г.' suffix from the date string.
+         * This suffix is automatically added by IntlDateFormatter::format() to indicate "year" in Bulgarian,
+         * but IntlDateFormatter::parse() fails to handle it properly, causing a parsing error.
+         * To ensure successful parsing, we normalize the date string by removing 'г.'.
+         */
+        if (Yii::$app->formatter->locale == 'bg') {
+            return str_replace(' г.', '', $formattedDate);
+        }
+
+        return $formattedDate;
+    }
 }