about 1 year ago - /u/ - Direct link
A lil somethin somethin: You can find the details for this event on the announcement page here.
about 1 year ago - Blitzkrieg Wulf - Direct link

The feast of Saint Patrick, the patron saint of Ireland, is observed on March 17th. This holiday has long since stopped being a purely religious one and thanks to the Irish immigrants spread across the entire world.
Today it is an international celebration of Irish culture: people dress in green, drink beer and wave Irish flags. Join the feast!

From March 17th (11:00 GMT) until March 20th (7:00 GMT)

Play 3 battles using any vehicles (rank III or higher, with an activity of not less than 70%) to receive the “Lucky pin-up” decal.

“Lucky pin-up” decal

Complete the task in random battles, except for Enduring Confrontation missions and [Assault] mode. Track your progress in the hangar by clicking Nickname → Achievements → Holidays → St. Patrick’s Day.

You can find the decal in the “Holidays” tab in the Customisation menu.