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Symmetry454

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Also known as Sym454

The Symmetry454 calendar (Sym454) is a proposal for calendar reform created in early 2004 by Dr. Irv Bromberg, an assistant professor at the University of Toronto, Canada (retired in 2018). It is a perennial solar calendar that conserves the traditional month pattern and 7-day week, has symmetrical equal quarters, and starts every month on Monday.

In the Vinony graph

Vinony's link graph records 187 inbound references to Symmetry454, and connects out to Maya calendar, Canada and week.

Vinony files it under 2005 introductions, Leap week calendars and Proposed calendars.

Vinony links it to 13 Wikipedia language editions.

Wikidata facts

Subclass of
solar calendar
Show 1 more fact
maintained by WikiProject
WikiProject Mathematics
Sources (1)

via Wikidata · CC0

~10 min read

Encyclopedic overview

7 sections
Contents
  • Calendar year
  • Leap rule
  • Calendar arithmetic
  • Easter on a fixed date
  • See also
  • References
  • External links

The Symmetry454 calendar (Sym454) is a proposal for calendar reform created in early 2004 by Dr. Irv Bromberg, an assistant professor at the University of Toronto, Canada (retired in 2018). It is a perennial solar calendar that conserves the traditional month pattern and 7-day week, has symmetrical equal quarters, and starts every month on Monday.

== Calendar year ==

Excerpted from Wikipedia’s “Symmetry454” article, available under the CC BY-SA 4.0 licence.

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