Convergence calendar

The Convergence calendar is an unofficial and fictional calendar centered on the Gregorian date of December 21, 2015. It has the same year system as the Gregorian calendar, which includes leap years, and it relies on Julian dates. One can think of the Convergence calendar as a marker for the number of days and years since the Convergence.
==Date Classifications==
Knowing the Julian date is essential for converting from the Gregorian calendar to the Convergence calendar.
To get the date in the Convergence calendar, take a Julian date in the Gregorian calendar and add 11 days.
Year 0 of the Convergence calendar refers to 21 Dec 2015–20 Dec 2016 in the Gregorian calendar. Years before this are notated BC (Before the Convergence), and years after this are notated AC (After the Convergence). Hence,
:20 Dec 2015 = 365, 1 BC
:21 Dec 2015 = 1, 0
:...
:20 Dec 2016 = 365, 0
:21 Dec 2016 = 1, 1 AC
:...
:20 Dec 2017 = 366, 1 AC
:21 Dec 2017 = 1, 2 AC
==Sample Dates==
Date Comparisons
Event 	Gregorian 	Convergence
Ampharosian Ambrosia 	28 Mar 1769	98, 247 BC
Tesseract Shatter 	03 Apr 1974	104, 42 BC
The Bite of '87 	19 Mar 1987	89, 29 BC
Formation of the Omnis 	31 Mar 2010	101, 6 BC
Zed's arrival from the future	27 Oct 2014	311, 2 BC
The Convergence 	21 Dec 2015	1, 0
Start of Infinity War I 	22 Jan 2019	33, 3 AC
Outer Regions Battle 	29 Mar 2029	99, 13 AC
End of Infinity War I 	10 May 2060	142, 44 AC
Zed's autobio published 	03 May 2077	134, 61 AC
Mevdarian Invasion 	03 Jun 2167	165, 151 AC
Category:Calendars