Fix year in Automatic Birthday Slack Message

[Jean_Pierre_Traets]

Dear @Evgeniy_Mamontov,

Have you concerned to use this method from @Saul_Garcia

Calc easter (Ostern)

Hi @Kristijan_Moser! I would add a Google Calendar Pack syncing only holidays and from the current year. [Google Calendar Sync] Then, in another table reference the date that matches easter in the Google Calendar table.

Otherwise you can only search for the month and day to find yearly repeating events: