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.
| Week | Days | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| W0 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 |
| W1 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| W2 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 |
| W3 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 |
| W4 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 |
| W5 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 |
| Blank | 60 | |||||||||
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).
Month-week-day format:
- 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).
