Unified Calendar

The Unified Calendar is the official civil calendar of Yamatai, based on the movement of Yamatai, though with months and years carried over from Tiandi times. Originally known as the Hananozo Calendar, the calendar's "0" year is the year that Yashima was reunited. Under the calendar, the current year is 2553.

There are seven days in the week, a fixed amount of days in a month, and twelve months in a year, which consists of 365 days.

Years
The original Hananozo Calendar followed the lunar calendar, meaning the New Year was variable annually. However, following the Great Silence and the need to update the calendar for a life after Tiandi, the New Year was declared on the day the news of the Great Silence arrived. Due to this, the year 2050 lasted about half a year, with only six months having passed.

Months
There are 12 months in a year. The months retain their traditional names from Tiandi. They are, arranged in order:
 * Mutsuki (睦月)
 * Kisaragi (如月)
 * Yayoi (弥生)
 * Uzuki (卯月)
 * Satsuki (皐月)
 * Minazuki (水無月)
 * Fumizuki (文月)
 * Hazuki (葉月)
 * Nagatsuki (長月)
 * Kannazuki (神無月)
 * Shimotsuki (霜月)
 * Shiwasu (師走)

OOC
Note that the Unified Calendar is not based on Earth dates - there was no Jesus on Tiandi to base the calendar on. The year in "Earth years" is about +120 years, meaning that as the Great Silence occurred in 2050, in Earth years this would be 2170. This also explains why the First Wave of Human Colonisation occurred in the 1960s - really the 2080s for us.