Fix birthday

[MineKing9534]

Checklist

• [x] Read Contribution Guidelines and Style Guides
• [x] Test the Code
• [x] This PR is ready to review and merge

Description

Fixes birthdays

Migration

Using 0 as default year broke the database for some reason. The default year now is 2000 which seems to work. However, all birthdays that were saved with the previous system may be off by a few days. For example when testing this PR and setting my birthday to MARCH 23 with the old system, MARCH 25 was written to the database

delete from birthdays;