Originally Posted by
JMBResona
Hmm...all imperial birthdays since Meiji have since remained national holidays in one way or another, so I'd expect more of the same.
I don't know if it's been officially confirmed though.
As far as I know, Taisho Emperor's birthday (Aug 31) has not remained a national holiday. But Showa Day (Apr 29) coincides with the Showa Emperor's birthday and Culture Day (Nov 3) coincides with the Meiji emperor's birthday.