Calendar yearly recurring event - wrong month name

[yflory]

Description

On the 30th of any month, yearly recurring events on February show the wrong text in the event edit popup:

Every 1 year(s) on the first Monday of March

Steps to reproduce

1. Create a yearly recurring event on February
2. Use custom rule: Every {nth} {day} of February
3. Wait for the 30th of your current month and see the wrong text displayed

Relevant logs

No response

Expected behavior

Show correct text:

Every 1 year(s) on the first Monday of February

Which operating system are you using?

No response

What browsers are you seeing the problem on?

No response

Extensions

/

Version

5.6.0