from noon (eastern) today, till noon tomorrow, in the event tab you will find arcade mode with +20% exp & lions, AND all the maps are set for night time. Also, you can unlock a new plane. The Po 2. For Arcade, it's 20 kills, then 60, then 120. HB is 5 kills, then 30, then 50. FRB is 5 kills, then 15, then 25. Happy hunting
Well Gaijin messed up with timing, so I couldn't finish my 20 kills after I got home, since when I was doing it servers entered maintenece.