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

On June 6th, 1944 over 150,000 Allied soldiers landed on the beaches of Normandy under heavy fire from German fortifications. Opening a second front in Western Europe was one of the most important events in World War II and led to the Allied victory in less than a year.

D-Day historical events
From June 2nd (12:00 GMT) until June 7th (7:00 GMT)
Participate in 6 events with historical presets of ground vehicles and aircraft. In air RB in addition to the [Operation] mission, an [Assault] mission is also available for more dynamic gameplay.
“D-Day” decal
From June 2nd (12:00 GMT) until June 7th (7:00 GMT)
Play 3 battles using American and British vehicles (rank III or higher, with an activity of not less than 70%) to receive the “D-Day" text decal.

"D-Day" text 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 → D-Day.

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

D-Day Tournament Series Register right now and from June 2nd through to the 8th participate in tournaments of aircraft, naval and ground vehicles. 14 tournaments with a combined prize pool of 163 000 GE, and also a special “D-Day” decal and “Normandy Ace” title. Join the official eSport Discord community[discord.gg].
Go to the tournament website[tss.warthunder.com]