AGS has finally confirmed
that the Winter Convergence content is hitting live servers and its happening:
Thursday 16th at around 13:00 CET (23:00 AUZ / 12:00 UK / 07:00ET / 04:00 PT)
Downtime is expected to last 3 hours and you can expect to see all the winter festivities outlined in BDLG's recent article
about the Winter Convergence as well as a the full rollout of the endgame Expertise system along with the Gypsum system!
Details in the official New World article is here