What Artemis and Apollo do on their spare time together

Sleeping when younger

Apollo would go to sleep in the winter stupid early and wouldn't wake up until about noon. In the summer he's up almost all day.
Artemis on the other hand would be up all day in the winter and sleep through summer. There were days when she would be awake for 3 hours then go back to sleep.
When they got older they adapted a normal sleep schedule. It was a train wreck when they were little though...