On 2020-08-20 19:54:16 +0200 (+0200), Pierre Riteau wrote: [...]
Unless I am mistaken, a schedule based on the Nth day of month is not fixed to even or odd weeks. For example, in June the first and third Monday were in weeks 23 and 25 (odd), but since July they take place in even weeks. [...]
Correct, this is documented in the README.rst for the yaml2ical library, which irc-meetings uses to render this metadata into scheduling: https://opendev.org/opendev/yaml2ical#user-content-frequencies "biweekly-odd Occurs on odd weeks (ISOweek % 2 == 1)" "Odd/Even and week numbers are based on the ISO week number. ISO weeks can be checked with %V in GNU date(1)" I think some people have assumed it's even/odd week numbers in a month rather than even/odd week numbers counting from the epoch. Technically we have frequencies like "first-tuesday" and "third-tuesday" to address specific week numbers in a month rather than truly alternating weeks. -- Jeremy Stanley