Season 2 End & Season 3 Start Dates:
There will be a short period of time between when a Season ends and the next begins. During this time, you’ll be able to sort through your rollover rewards and review your progress on the Leaderboards. It’s a great time to reflect on the accomplishments you’ve made and enjoy the culmination of your pre and post-Season loot hunts!
Season 2 will be ending at the following dates and times for each region:
North America: Sunday, April 5 @ 9:00 p.m. PDT
Europe: Sunday, April 5 @ 9:00 p.m. CEST
Asia: Sunday, April 5 @ 9:00 p.m. KST
Season 3 will be starting shortly after at the following dates and times for each region:
North America: Friday, April 10 @ 6:00 p.m. PDT
Europe: Friday, April 10 @ 6:00 p.m. CEST
Asia: Friday, April 10 @ 6:00 p.m. KST
http://us.battle.net/d3/en/blog/18313042/