When does the ETS2 Polar Express challenge end?

When does the ETS2 Polar Express challenge end? - Kids Making Easter Eggs

The blog doesn't say when it ends, and I would like to know until when do I have to complete the challenge to get the Raven skin DLC.

euro-truck-simulator-2

Pictures about "When does the ETS2 Polar Express challenge end?"

When does the ETS2 Polar Express challenge end? - Kids Having Fun with Easter Eggs

When does the ETS2 Polar Express challenge end? - Crop people playing cards at table

When does the ETS2 Polar Express challenge end? - Asian girl playing chess in bright room

ETS 2 MP The Final Kilometers of the Polar Express Challenge

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: cottonbro, cottonbro, Olga Fedina, Monstera