From 7fec6ca63609c19b33f772c26dfb226a8ae4d286 Mon Sep 17 00:00:00 2001
From: "Torsten Schulz (local)" <tsschulz@gmx.net>
Date: Fri, 30 Jan 2026 14:41:02 +0100
Subject: [PATCH] Improve date handling in CalendarView: Add comments to
 clarify the logic for setting the date to the first of the month to prevent
 overflow issues when navigating between months. This enhancement aids in
 maintaining accurate date transitions in the calendar view.

---
 frontend/src/views/personal/CalendarView.vue | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/frontend/src/views/personal/CalendarView.vue b/frontend/src/views/personal/CalendarView.vue
index 6300508..3200ac7 100644
--- a/frontend/src/views/personal/CalendarView.vue
+++ b/frontend/src/views/personal/CalendarView.vue
@@ -467,6 +467,8 @@ export default {
             const newDate = new Date(this.currentDate);
             switch (this.currentView) {
                 case 'month':
+                    // Set day to 1 first to avoid month overflow (e.g., Jan 31 - 1 month = Dec 31, not Dec 1)
+                    newDate.setDate(1);
                     newDate.setMonth(newDate.getMonth() - 1);
                     break;
                 case 'week':
@@ -483,6 +485,8 @@ export default {
             const newDate = new Date(this.currentDate);
             switch (this.currentView) {
                 case 'month':
+                    // Set day to 1 first to avoid month overflow (e.g., Jan 30 + 1 month would skip Feb)
+                    newDate.setDate(1);
                     newDate.setMonth(newDate.getMonth() + 1);
                     break;
                 case 'week':