In the Almost Decimal Calendar, the year is divided into 5 quinters (alias quintals) or into 10 months, each of which contains a whole number of weeks in a pattern of 10:11 for the former and 5:5:6:5 for the latter. That means each quinter is split into two months and a year has 10 months. The leap week is appended to the last quinter and month.
The 1st and 3rd are always short quinters. In a normal long quinter (i.e. the 2nd and 4th), the first month is 6 weeks long (6:5), but in leap years, the second month of the last, 5th quinter is a week longer than the first (5:6). This way, month 5 ends after week 26 and aligns nicely at the half-year mark with most other leap-week calendars.
|5:5:6:5||month 1||month 2||month 3||month 4||month 5||month 6||month 7||month 8||month 9||month 10†|
|10:11||quinter 1||quinter 2||quinter 3||quinter 4||quinter 5†|
|9:9:8||sester 1||sester 2||sester 3||sester 4||sester 5||sester 6†|
|7:6||month 1||month 2||month 3||month 4||month 5||month 6||month 7||month 8†|
|13||quarter 1||quarter 2||quarter 3||quarter 4†|
|Academic (example)||Spring semester||Summer break||Fall semester|
|Winter semester||Spring break||Summer semester||Winter semester|
|Epiphany/Hilary trimester||Trinity trimester||Summer break||Michaelmas trimester|