This tells you how geographically spread out the player base is. That's 15 timezones and doesn't go as far as to include the Aussies and Kiwis.
I can personally relate.
In 8 years I've lived in / played fro US Central (GMT-6) to Singapore (GMT+8) to the Britain (GMT), adjusting for seasons.
It's good to see the Staff spreading out the event times so they're accessible for people across ALL those time zones.
And we definitely have people from Italy, Austria, Norway and the Netherlands who may like to join in even though it will be 1AM for them.
Thanks for considering everyone everywhere as you balance out these event times.