As you may have gathered, I'm not v. experienced in VATSIM and so I don't know outright.
I'll check through it and come back to you guys.
[UPDATE]
VATSIM has only 18 divisions most outside of Europe.
Within Europe there are only 3 divisions:
UK
Russia
EURD - Rest of Europe (However, their latest event on their site is a OneSky from 2005!!)
Regarding online days they are not focused on countries but rather, on airports. Mostly they are all German ones (Frankfurt, Nurenberg, Hamburg etc.).
Again for info, their calendar page is:
http://www.calsplus.net/vatsim