Firmament Sage 3U
Creature - Human Wizard (Uncommon)
If it is neither day nor night, it becomes day as Firmament Sage enters the battlefield.
Whenever day becomes night or night becomes day, draw a card.
Sunrise Cavalier 1RW
Creature - Human Knight (Uncommon)
If it is neither day nor night, it becomes day as Sunrise Cavalier enters the battlefield.
Whenever day becomes night or night becomes day, put a +1/+1 counter on target creature you control.
While white, blue, and red all have a hand in day/night matters, the RW signpost uncommon is pointing towards their Limited strategy using the day and night changes to beatdown on the opponent. Firmament Sage is really strong surrounded by day/night changes.
Yeah, I perceive the same problem. Also it's weird that astronomers are making it day instead of night. Vadrik, Astral Archmage does the same thing. You're not gonna get a lot of astronomy done in the day.