In the future, should you copy and paste said page(s), be sure to check the dates, as this year's Wintersday Release page states Wintersday ends on January 7th.
It seems it ended on January 5th. (I assume the mistake was due to copy/paste from previous year[s].)
Comments
You might want to link which page exactly to give useful feedback to the devs? https://www.guildwars2.com/en/the-game/releases/december-15-2020/
lists January 4
So it does.
It's the page the link on this page directs to: https://www.guildwars2.com/en/news/wintersday-2020-is-live/
Well, looks like it's been fixed. That was fast, if not a bit late.