if my Analyses of THE MATTER holds true, then, basically, the best (and simplest) way to decide on what alternate day to celebrate your other birthdays depends on whether you came from out of The Womb before 12 p.m. or after 12 p.m.(♫):
if after 12 p.m., then, celebrate March 1st;
if before 12 p.m., then, celebrate February 28th.
that should definitively-settle The Matter, with relatively-little fuss, yes?
(♫) (as according to recorded-Hospital Time, naturally)