Check your birth record. Sometimes they list the ages of the parents and you can get an estimate of the year your parents were born. From there you need to know their full names and where they were born. Then you can have the vital stats bureau in that city/town/county or state do a search.
How can I find someone's birth date?
https://www.youtube.com/watch?v=FSf2FqalhcA
How can I make my dad's birthday special?
- Give him a day off. ...
- Recreate your most special memories with him. ...
- Surprise your old man by planning a picnic for him. ...
- Make him a coupon book and make the whole event dramatic. ...
- Give him gifts that encourages his hobby. ...
- Hang up framed pictures or quotes in his bedroom.