Here’s a headcanon I have for Apollo
When the Olympian’s have to have a meeting they all have to talk one after the other and cannot interrupt each other. Zeus has made it a rule.
The reason?
Whenever someone lies Apollo, who is always shining light, stops shining for a little bit.
Zeus ended up finding this out and began using Apollo as a lie detector.
So now the gods make sure to be careful and not get too personal. The best way to keep your secrets is to keep them to yourself.
Artemis learned this from Apollo and told every god because Apollo just wants to go back to riding his chariot while he writes songs and poems.
Everyone try’s to stay out of trouble with Zeus because they don’t want to deal with his anger and Apollo has a book that he puts a tally in for every time he has to be called in to play lie detector and when Summer comes it the amount of tally’s a god gets is the amount of hot days they will get in their region and if it’s more days then should be warm then they get doubled up on to other summer days and make them hotter.
They have been doing good for a while at the beginning but over the years it has gotten so bad that summers are now almost always extremely hot.
It’s climate change and Apollo being called into interrogations to play lie detector. 
