Symmetry010
| Epoch | Confidence |
|---|---|
| 1 January 1 CE | Exact |
Overview
The Symmetry010 calendar is a Gregorian-derived calendar proposed by Irv Bromberg.
It features the same months as the Gregorian calendar but of different lengths, following a pattern of 30/31/30 days. This allows for each quarter of every year to follow the same pattern of 13 weeks or 91 days.
The calendar features a leap week that comes after December (humorously labeled as "Irv" by its creator), occurring every 5 or 6 years. This keeps it in line with the Gregorian calendar on a 293-year cycle containing 52 leap years.
The format of the calendar allows each day of the year to always occur on the same day of the week.
Info
This calendar is calibrated using 1 January 1 CE as a reference date.
| Months | Days |
|---|---|
| January | 30 |
| February | 31 |
| March | 30 |
| April | 30 |
| May | 31 |
| June | 30 |
| July | 30 |
| August | 31 |
| September | 30 |
| October | 30 |
| November | 31 |
| December | 30 |
| Leap Week ("Irv") | 7 |
Accuracy
Being a simple calculation of days with a known epoch, this calendar is expected to be exactly accurate.
Source
The information for this calendar came from this website.