That link within the article is also confusing/or misleading, as it says the following:
Holiday 2021
New Years Day Friday, January 1
New Years Day, the 1st, is Saturday, and the link cited does not state New Year's Day holiday "observed."
From the first article:
Global financial markets mostly will be closed on Friday, Dec. 31, or Monday, Jan. 3, 2022, in observation of the New Year’s holiday, but U.S. markets won’t.
Best,
Tod