[Bug]: Typing your birthday in profile birthday date field fails

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

I've typed in my birthdate into the date field of my profile...
When the cursor reached the year-section, it has overwritten the date and month section with other numbers... (I didn't understood the logic behind)

I was born in 198x, but it's not possible to type in that number/year.

Steps to reproduce

1. Open your profile
2. Try to type in your birthdaydate

Expected behavior

I think it's clear... my b-date

Nextcloud Server version

30

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.2

Web server

Apache (supported)

Database engine version

MySQL

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

I don't know if the bug is new in Version 30... because I didn't have entered my birthday date before...

Start by reproducing the problem in the profile birthday date field on Nextcloud Server 30, using the reported steps and environment as a baseline. Trace the profile date-field entry point and verify that typing a year preserves the entered month and day, then confirm the birthday can be saved correctly.