Byzantine (TRT)
| Epoch | Confidence |
|---|---|
| 18 July 5508 BCE +21:00:00 | High |
Overview
The Byzantine calendar was the official Julian-based calendar of the Byzantine Empire from 988 to 1453 and was used in Ukraine and Russia until 1700.
It differed from the Julian calendar with the new year starting on September 1st and the epoch being September 1st, 5509 BC (July 19th, 5508 BCE in the proleptic Gregorian calendar). Years are counted in AM, or 'Anno Mundi' meaning 'Year After Creation'.
Info
| Months | Days |
|---|---|
| September | 30 |
| October | 31 |
| November | 30 |
| December | 31 |
| January | 31 |
| February | 28 or 29 |
| March | 31 |
| April | 30 |
| May | 31 |
| June | 30 |
| July | 31 |
| August | 31 |
Accuracy
The Byzantine calendar is intrinsically based on and locked to the Julian calendar, making it perfectly accurate. However, there is some confusion as to when the day actually begins, with sources seemingly contradicting each other.
Source
All of the information on this calendar came from its Wikipedia article.