It can be at whatever time, topic, set-up, punchline, etc. It can either be based on Easter or not. The choice is yours.

7472429 You can't build a Dyson Sphere at night. You know, 'cus it's in space and there is no day and night cycle, it's just an eternal day...
Celestia would have gotten the gag...

7472440
I love it.

7472444 It's partially based on my April fool's day blog:
https://www.fimfiction.net/blog/943047/im-leaving-fimfiction-to-build-a-dyson-sphere