> On Mar 1, 2:13 am, Super-Menace <fortr...
> > So Happy Birthday, Superman! And many more!
> That's his Krypton equivalent birthday because a Kryptonian year is
> longer than an Earth year.
Feb 29 is his birthday because Mort Weisinger didn't want to have to do
a birthday story every year. Julie Schwartz continued the tradition.
> It has also been given as sometime in October.
There is a single reference to that in a story from 1950. It's in
Action Comics v1 149.
Clark Kent celebrates his birthday on a different day -- Jun 18, the
day Ma and Pa found his rocket. The more recent (2009) Superman:
Secret Origin gave this date as Dec 1, but this does not seem to have
caught on among fans.
The Lois & Clark show moved Kal-El's birthday to Feb 28 because it had
it that Kal-El was born in 1966, the same year as Dean Cain, and of
course 1966 was not a leap year.