6*6*10 is a perennial solar calendar with:
- 6 months per year
- 6 weeks per month
- 10 days per week
Every month ends with a blank day, with the exception of the last month in non-leap years. Blank days are intercalary days and can be treated as holidays.
Nice attributes of the 6*6*10 calendar
The units are regular:
- Every year is the same (except leap years).
- Every month is the same (in leap years).
A regular calendar simplifies scheduling.
Days of month are decimal zero-based numbering:
- One's place corresponds to the weekday number.
- Ten's place corresponds to the month's week number.
Thus dates are easy to compute and visualize in your head.
The units are divisible (ignoring blank days):
- All units are divisible by half – ½ year, ½ month, ½ week.
- All units are divisible a second way – ⅓ year, ⅓ month, ⅕ week.
Divisibility allows flexibility. For example, if weeks (10 days) is too long for a recurring schedule, then use a half weeks (5 days).
- Explicitly states the week number and weekday (no need to consult a calendar to look up the weekday).
- MWD consumes only three digits (which is more compact than Gregorian's MMDD four digits).