The servers will be brought offline for several hours tomorrow (10th January) for maintenance and to end the Xmas event. This means you still have a day to wrap up whatever unfinished Xmas business you have and turn in those tokens.
That being said, whatever remaining tokens you have, don’t throw them away, they will remain valid next year when the Xmas event returns.
During the downtime the servers will also be updated for the new UI in order to be able to quickly enable it once internal testing is completed. The reason this is done now is because the testing is in its final stage and the new UI should be able to be rolled out “any day now”.