I don't remember, if the gifting ends on the 24th or lasts until 31st, but actually I believe it has always ended at Christmas. Anyway, I can no longer put anything under trees, but then we haven't been able to collect our presents yet?
You can open your tree at this link. There wasn't a news post about it, but the trees were open yesterday morning.
If you haven't received gifts yet, you'll need to go to the Kumos site, and select the "Presents" tab after viewing your tree. If you're having trouble getting there, here's a direct link to your tree: https://kumos.subeta.net/explore/arctic/tree