I wonder why https://docs.python.org/3.8/library/time.html#time.strftime is missing the directives %G, %u and %V for the ISO week date, although they work: $ python3 Python 3.8.10 (default, Sep 28 2021, 16:10:42) [GCC 9.3.0] on linux Type "help", "copyright", "credits" or "license" for more information.

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from time import strftime strftime("%G-W%V-%u") '2021-W42-7'

Were these directives forgotten in the documentation or why were they not documented? Best regards, Rafał