The 30x11 Calendar
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The 30x11 (Thirty-eleven) Calendar is a calendar reform of the Gregorian calendar proposed by Stephen Abbott, a public relations consultant and writer in Manchester, New Hampshire.
The first 11 months of the year (January through November) have 30 days each, while December has 35 days, except during leap years, when it has a 36th day, which becomes the last day of the calendar year. It features three equal business quarters of 90 days each, with the final quarter lasting 95 or 96 days.
| No. | Name | Days |
|---|---|---|
| 1 | January | 30 |
| 2 | February | 30 |
| 3 | March | 30 |
| 4 | April | 30 |
| 5 | May | 30 |
| 6 | June | 30 |
| 7 | July | 30 |
| 8 | August | 30 |
| 9 | September | 30 |
| 10 | October | 30 |
| 11 | November | 30 |
| 12 | December | 35 or 36 |
Like the current calendar, the 30x11 Calendar has 365 days, with 366 in leap years. Leap years in the 30x11 Calendar would occur in the same cycle as the Gregorian calendar.
The 30x11 Calendar preserves the traditional 7-day week and the 12-month calendar year, and does not seek to start each year on the same day of the week each year, as some calendar reform proposals do. Thus it is not, and does not attempt to be, a "perpetual calendar". It may be implemented in any year, since it may begin on any weekday.
The proposal allows for easy computation of ordinal day numbers. For example, the first days of each of the first six months would be: days 1, 31, 61, 91, 121, 151. This makes determining the number of each day easy. June 8 will always be the 158th day of the year, December 1, the 331st day.
Most monthly calendars repeat within the year. January’s calendar is the same as August’s, February’s is identical to September’s. March and October, and April and November likewise match.
Each month in the 30x11 Calendar begins exactly two weekdays after the previous month. If, as in 2006, January starts on a Sunday, February would start on a Tuesday, March on a Thursday. This makes determining days of the week simple. February 8, 15, 22, and 29th occur Tuesdays in this example.
The calendar does not utilize "off-calendar" or "null" days that stand outside the calendar year in order to reach 365 or 366 days. Therefore, the 30x11 Calendar's Dec. 32 through Dec. 35/36 should not be considered "extra" days added to the calendar, nor part of a "leap week" that recurs every few years (as do proposals like the Symmetry454 Calendar) but as the 362nd through 365th/366th days of the regular solar calendar.
The 30x11 calendar does fail to address the problem of achieving four equal quarters, as some other calendar reform proposals have achieved by using leap weeks and off-calendar days.
