Describe the bug

The screenshot was taken on the 2025-10-15 at 23:50. The red line indicates the current time is 00:00 in the morning on 2025-10-15.

To reproduce

Look at your schedule at a time between 23:45 and 23:59, or change your system time.

Expected behavior

The red line should indicate 00:00 on 2025-10-16, because the time is rounded to the nearest 30 minutes.