Birthdays and Other Special Days

I shall be 83 next year and celebrating my 2nd. bar mitzvah. My sedra is Pinchas. Which haftorah will be said, Pinchas or Mattos?

Shalom, My cousin was born in Buffalo, NY on February 17 1990 at 6:18 pm. It was Shabbos going into Motzoei Shabbos and one minute before tzais hakohavim. Shabbos was 22nd of Shvat and Sunday 23rd. Which day is considered her birthday?