How to find out your girlfriend's birthday?

1. Try to look at her ID card, diploma, household registration book and other related documents;

If you have a chance to find a fortune-telling book and pretend to be a fortune teller, maybe she will tell you her birthday. Of course, you can also use your mobile phone.

3. Know her birthday through friends;

4, ask directly, don't be afraid, you ask her birthday, if she loves you, she will be very happy, not angry.

Good luck!