as usual Travian servers will take a break from the conflicts during the holidays. During this period you will be able to login in the game, build structures and so on, but you will not be able to attack anybody.
We will have 2 periods of truce:
-one for the Christmas (since 12:00 of 24th of December tll 11:59 of 26th, your troops will not starve till 27th at 11:59)
-one for the new year's eve, starting at 16:00 of the 31st of December till 15:59 of 1st January, this time the "anti-starving" bonus will last till 2nd of January at 15:59).
Check out the official topic for more info!