Guild Wars 2

The daily reset is worldwide (iirc).

It resets at midnight/1am for the GMT European population and mid-evening for PST. If you are planning your days around it, then complete it right after it reset?

I won’t go into the optional/required bit as I see it as a required goal personally, even though I don’t run FotM.

You can usually just say on map that there is a group event starting and people will flock in from every corner.

This is especially true in Queensdale where the champ troll, champ spider, wasp queen, champ boar and champion treant (forget its name) are short cooldowns.