Hearts and Hooves Day/Valentine's Day · 5:16pm Feb 14th, 2017
Starfleet DOES celebrate H&H, (As was shown in my Season five) But they Didn't while on Unicornicopia because that was an EQUESTRIAN Commercial holiday, not theirs... plus, as I have mentioned before, the holidays were not and would not be outlawed. It's just most of the time the Space Ponies CHOOSE not to celebrate. (Like how PEOPLE can choose not to celebrate)
1: It makes them too vulnerable to enemy attacks
2: They just don't feel like celebrating