While I understand that the feature you have introduced may not been used by users for feedback, I do not support publishing my or anyone else's date of birth on a website. A date of birth is used most of the times for identifying one for financial transactions such as credit card balances and verifications at bank as well as immigration related formalities. Instead of the date of birth, you can introduce a donor id as a required field and then proceed with the same procedure as earlier. I hope it helps.Thanks,
Regulatory & Capital Markets Consulting
D&T AERS India Pvt. Ltd.