Here are all of the codes for 19.3. (you can activate only 1). They will start working at 05:00 UTC.

Codes for other days might still work: 16.3. 17.3. 18.3.

SPEC2R7 3 x Golden Horseshoe Decal 3 x Steady Hand 2 x +50% to Combat XP for 1 h SPEM4O1 3 x Material Luck Decal 6 x “Snake 1” Emblem 2 x +200% to Free & Crew XP for 1 h SPEE6H9 1 x Shamrock 2D Style 3 x Focus on Target 3 x Steady Hand SPEY8X1 1 x Shamrock 2D Style 6 x “Snake 2” Emblem 2 x +200% to Free & Crew XP for 1 h SPEH6S3 3 x Golden Horseshoe Decal 3 x Material Luck Decal 6 x “Snake 2” Emblem