Working on a CS370 (Software Engineering) project with 5 people; 2 of which feel like their time is more important than everyone else's so when we all meet as a group to go over presentations, documentation and other things we need to do as a group, they silently sit alone working on bits of code they should have done previously. Then when we can't get docs done and handed in on time, one of the two decides to spam our group chat at 2am when 2 of us are sleeping because we work in the morning, one of us is sleeping because of morning classes and the last one is doing god knows what. Like, I'm sorry. But failure to do your shit on time does not constitute an emergency on my shit. All of our weekly peer reviews reflect on how no matter what we say to these two; they refuse to work as a team.
!rant, more like dev hint
In a team, your time is not more important than team time. You can do things on your time whenever you want; but unless your entire team shares your schedule, team time might be a rare commodity and should be used as such.