Cuman Calendar

The Cuman Calendar is a calendar created by Americana in early Cumania Season 3 and used in all Minecraft servers since, and universally used for historical records of all servers. 
The calendar is based around an event called the Conjunction of the Spheres - an error which caused Cumania's original seed to be merged with a new one, which would later become Minecrosia - which took place on July 14th, 2019. In the calendar, every Gregorian Calendar day corresponds to a year, with years before the Conjunction being noted as Before the Conjunction of the Spheres (BCS) and years after being noted as After the Conjunction of the Spheres (ACS). Year 0 is ambiguous and can be noted as either 0 BCS or 0 ACS, or neither.
While July 14th, 2019 is Year 0 for most servers, it is changed in MCEarth 1, Minecrosia, and Orbis - it correponds to June 8th, 2019 in MCEarth 1, August 31st, 2019 in Minecrosia and November 12th, 2027 in Orbis.
==Year Conversion==
Year conversion is done as explained above - by calculating the time between the day corresponding to Year 0 of a given server and the wanted day. Brazilian wrote a software in C++ to ease calculation and it is publicly available in BMC, with a special version for Orbis also being made due to the different Year 0.
Below is a conversion table for some relevant days of the servers:
Day-Year conversions
Server 	Cuman date	Gregorian date 	Event
Cumania 	53 BCS 	May 22nd, 2019 	Beginning of Season 1.
Cumania 	39 BCS 	June 5th, 2019 	End of Season 1.
Cumania 	0 ACS 	July 14th, 2019 	Beginning of Season 2.
Cumania 	26 ACS 	August 9th, 2019 	Beginning of Season 2.5.
Cumania 	33 ACS 	August 16th, 2019 	End of Season 2.
Cumania 	241 ACS 	March 11th, 2020 	Beginning of Season 3.
Cumania 	333 ACS 	June 11th, 2020 	End of Season 3.
MCEarth 1 	0 ACS 	June 8th, 2019 	Beginning of the server.
MCEarth 1 	12 ACS 	June 20th, 2019 	End of the server.
Minecrosia 	15 BCS 	August 16th, 2019 	Beginning of the server.
Minecrosia 	0 ACS 	August 31st, 2019 	End of the server.
MCEarth 2 	89 ACS 	October 11th, 2019 	Beginning of the server.
MCEarth 2 	176 ACS 	January 6th, 2020 	End of the server.
Old Mediterranea	353 ACS 	July 1st, 2020 	Beginning of the server.
Old Mediterranea	375 ACS 	July 23rd, 2020 	End of the server.
Folban 	436 ACS 	September 22nd, 2020	Beginning of the server.
Folban 	459 ACS 	October 15th, 2020 	End of the server.
Cave Cumania 	545 ACS 	January 9th, 2021 	Beginning of the server.
Cave Cumania 	575 ACS 	February 8th, 2021 	End of the server.
Mediterranea 	718 ACS 	July 1st, 2021 	Beginning of Season 1.
Mediterranea 	806 ACS 	September 27th, 2021	End of Season 1.
Mediterranea 	885 ACS 	December 15th, 2021 	Beginning of Season 2.
Mediterranea 	999 ACS 	April 8th, 2022 	End of Season 2.
Orbis 	2000 BCS 	May 22nd, 2022 	Beginning of Season 1.
Orbis 	1823 BCS 	November 15th, 2022 	End of Season 1.
Orbis 	1615 BCS 	June 11th, 2023 	Beginning of Season 2.
Orbis 	1444 BCS 	November 29th, 2023 	End of Season 2.
MCEarth 3 	1250 ACS 	December 15th, 2022 	Beginning of the server.
MCEarth 3 	1332 ACS 	March 7th, 2023 	End of the server.
Aether 	0 ASO 	January 27th, 2024 	Beginning of the server.
Aether 	42 ASO 	March 9th, 2024 	End of the server.
Solis 	0 AES 	May 25, 2024 	Beginning of the server.
==Month conversion==
Since a year has 12 months, assuming all months have the same length, every month corresponds to two real life hours. Below is a conversion table for both GMT and BRT timezones (for convenience):
Hour-Month Conversions
Month 	Time (GMT)	Time (BRT) 	Time (EST) 	Time (MDT)
January 	00:00 	21:00 (previous day)	19:00 (previous day)	18:00 (previous day)
February 	02:00 	23:00 (previous day)	21:00 (previous day)	20:00 (previous day)
March 	04:00 	01:00 	23:00 (previous day)	22:00 (previous day)
April 	06:00 	03:00 	01:00 	00:00
May 	08:00 	05:00 	03:00 	02:00
June 	10:00 	07:00 	05:00 	04:00
July 	12:00 	09:00 	07:00 	06:00
August 	14:00 	11:00 	09:00 	08:00
September	16:00 	13:00 	11:00 	10:00
October 	18:00 	15:00 	13:00 	12:00
November 	20:00 	17:00 	15:00 	14:00
December 	22:00 	19:00 	17:00 	16:00
==Day conversion==
Since a month has, on average, 30 days, every day corresponds to four real life minutes. Below is a conversion table for all days of the month:
Minute-Day Conversions
Day 	Time 	Day 	Time
1st 	XX:00	16th	YY:00
2nd 	XX:04	17th	YY:04
3rd 	XX:08	18th	YY:08
4th 	XX:12	19th	YY:12
5th 	XX:16	20th	YY:16
6th 	XX:20	21st	YY:20
7th 	XX:24	22nd	YY:24
8th 	XX:28	23rd	YY:28
9th 	XX:32	24th	YY:32
10th	XX:36	25th	YY:36
11th	XX:40	26th	YY:40
12th	XX:44	27th	YY:44
13th	XX:48	28th	YY:48
14th	XX:52	29th	YY:52
15th	XX:56	30th	YY:56
==Hour conversion==
Since a day has 24 hours, every hour corresponds to 10 real life seconds. Below is a conversion table for all hours of the day:
Second-Hour Conversions
Hour 	Time 	Hour 	Time 	Hour 	Time 	Hour 	Time
00:00	XX:AA:00	06:00	XX:BB:00	12:00	XX:CC:00	18:00	XX:DD:00
01:00	XX:AA:10	07:00	XX:BB:10	13:00	XX:CC:10	19:00	XX:DD:10
02:00	XX:AA:20	08:00	XX:BB:20	14:00	XX:CC:20	20:00	XX:DD:20
03:00	XX:AA:30	09:00	XX:BB:30	15:00	XX:CC:30	21:00	XX:DD:30
04:00	XX:AA:40	10:00	XX:BB:40	16:00	XX:CC:40	22:00	XX:DD:40
05:00	XX:AA:50	11:00	XX:BB:50	17:00	XX:CC:50	23:00	XX:DD:50