Bug: There is a problem with the subscription display on the calendar.

[MiuNice]

There is a problem with the subscription display on the calendar, I set the next payment time for a subscription to December 31, 2024, but in the calendar it shows December 1, 2024, January 31, 2025, and March 3, 2025.
It looks like it's only been processed for +-31 days.

My original intention was to set the payment time to the last day of the month.

You also need to consider that different months may have 31 days, or 30 days, or even February leap year situations.