Contact birthdays on the 1st of the month are not visible

• This is not a feature request (existing functionality does not work, not missing functionality). I will request features on forum or via support.
• I've searched and did not find a similar issue.

Describe the bug Contact birthdays on the first of any month do not appear on the calendar, regardless of format (day/month or day/month/year)

To Reproduce Steps to reproduce the behavior: Setting a contact's birthday to the first of any month causes it to not appear on the calendar. If you adjust the birthday to the 2nd, it will appear. If you subsequently adjust it back to the 1st, it will remain visible on the 2nd, so long as it is a birthday entered without a year (ie: 6/1). If the birthday uses the year notation (6/2/2024), then when editing it back to 6/1/2024 it immediately disappears instead of having the ghosting effect described above. In both cases no birthday on the 1st of a given month is visible.

Expected behavior Birthdays on the 1st of a month should be visible.

Desktop (please complete the following information):

• OS: Windows
• v293.250624.0

Additional context I'm operating with US region in the pacific time zone.

I encountered a second issue that might(?) be related, which is that birthdays are correctly reporting the age of the contact on the calendar icon, but when you click on the entry they all consistently read a year older.