DeletedUser
The newest announcement has a date for us, but sadly, the quest wants you to buy diamonds. So yeah, skipping that one.
The newest announcement was for a premium on diamond purchases, but frosty hasn't shown and there is no evidence that this is, in fact, the quest it just says "winter bonus" so we're jumping to conclusions. If you've got better than what I've seen please let us know.
Though I might point out to the promotional team that you need to remind people which time stamp applies when you post time-specific events. January 26th at 0:01 is not the same as the servers. Some people are going to try and get in under the wire and find that they're not getting the bonus and then you're going to hear complaints about the time stamp not being clear enough.