Symmetry454
Encyclopedia
The Symmetry454 Calendar (Sym454) is a proposal for Gregorian
calendar reform
. It is a perpetual
solar calendar
that conserves the traditional 7-day week
, has symmetrical equal quarters, and starts every month on Monday.
Gregorian calendar
The Gregorian calendar, also known as the Western calendar, or Christian calendar, is the internationally accepted civil calendar. It was introduced by Pope Gregory XIII, after whom the calendar was named, by a decree signed on 24 February 1582, a papal bull known by its opening words Inter...
calendar reform
Calendar reform
A calendar reform is any significant revision of a calendar system. The term sometimes is used instead for a proposal to switch to a different calendar.Most calendars have several rules which could be altered by reform:...
. It is a perpetual
Perpetual calendar
A perpetual calendar is a calendar which is good for a span of many years, such as the Runic calendar.- General information :...
solar calendar
Solar calendar
A solar calendar is a calendar whose dates indicate the position of the earth on its revolution around the sun .-Tropical solar calendars:...
that conserves the traditional 7-day week
Week
A week is a time unit equal to seven days.The English word week continues an Old English wice, ultimately from a Common Germanic , from a root "turn, move, change"...
, has symmetrical equal quarters, and starts every month on Monday.