I’m not sure how users would know or enter the birth year when discourse neither provides a way to input the birth year nor does it display it anywhere in the UI. I think a default of 1904 is done as a placeholder to ensure the dates are valid but there is no other purpose of the Year in this.
This is the right place, we don’t have any sort of issue tracking enabled on Github. Someone from the team will inevitably read every post here, but not everything will be prioritized for immediate action or attention.