Allow less precise birthdate designation about pluralkit HOT 3 OPEN

Some people might like to specify their birthday as month and day, without a year, for various reasons

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Some people might like to specify their birthday as month and day, without a year, for various reasons

@mdpkh This is already possible. Specifying in mm-dd format will do this, or through the API, setting the sentinel year 0004 will work too.

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I'd also like to add that discovering my system later in life I had around 7 members pre-discovery that I could track to specific years but not months or dates. And with members I've added post discovery, I'd like their birthday field to be the month and year they formed formatted as (Month Year) (as I usually private the metadata field)

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