Sep. or 6 mos. later.
Somebody with a half birthday on April 20 will have a full birthday on October 20. Someone with an April 20 birthday has an October 20 half birthday.
APRIL 21
April 21
april 21
April 21
APRIL 21
April 21, 1979
April 21
April 21
March 21 to April 19
april 21
April 21, 1996