The seven-day week is used in conjunction with every major calendar, and alas, has replaced a good many other weeks (everywhere from 2 to 20 days long, depending on how you define things).
theAbysmal does account for this with the market week – such that today, Month 0 Day 0, as with every year, is also day 0 for all of the market weeks. These are weeks of 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 18, 20 days. None of the days are named like the days of the week are. Again, that’s up to the community of calendar users to decide.
As for the market week calendar, 7-, 13-, and 14-day weeks fall within the 364-days of theAbysmal perpetual calendar (excluding New Year’s Day, which falls on Dec 21st, and Leap Year Day which falls the day before when it occurs).
With respect to the other market weeks, they all coincide within a modified 360-day year (pictured above). This excludes the New Year Day, the Leap Year Day, and the four mid-quarter days (which fall on the equivalent of Feb 5, May 7, Aug 6, and Nov 5).
However, as the 13 months of 4 weeks is likely more familiar than living life by 9-day weeks, excluding five or six days spread throughout the year, this isn’t a priority for most people, however, I did want to provide a certain degree of flexibility with respect to organizing the days with the perpetual year.
If you’re really interested, here are breakdowns of the year according to the various weeks:
2~Day Market Week x 180
3~Day Market Week x 120
4~Day Market Week x 90
5~Day Market Week x 72
6~Day Market Week x 60
8~Day Market Week x 45
9~Day Market Week x 40
10~Day Market Week x 36
12~Day Market Week x 30
15~Day Market Week x 24
18~Day Market Week x 20
20~Day Market Week x 18
I don’t intend to publish a post for the beginning of every market week, in case anyone’s curious what I do with my free time.