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Topic: Symmetry454

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  Symmetry454 - Wikipedia, the free encyclopedia
The Symmetry454 Calendar (Sym454) is a proposal for calendar reform proposed by Dr. Irv Bromberg of the University of Toronto.
The Symmetry454 arithmetic is fully documented and placed in the public domain for computer implementation.
The Symmetry454 Calendar meets all of the WCC criteria.
en.wikipedia.org /wiki/Symmetry454   (447 words)

 CalendarHome.com - Calendar reform - Calendar Encyclopedia
Some calendar reform ideas, such as the Pax Calendar, Symmetry454 calendar and the Common-Civil-Calendar-and-Time Calendar, were created to solve this problem by having years of either 364 days (52 weeks) or 371 days (53 weeks), thus preserving the 7-day week.
These calendars add a leap week of seven days to the calendar every five or six years to keep the calendar roughly in step with the solar year.
The Symmetry454 calendar has alternating months of 28 and 35 days, and a leap week in December, when needed.
encyclopedia.calendarhome.com /Calendar_reform.htm   (738 words)

 The Symmetry454 Calendar   (Site not responding. Last check: 2007-10-14)
The Symmetry454 Calendar is a perpetual solar calendar that conserves the traditional 7-day week, has symmetrical equal quarters, and starts every month on Monday.
This document, entitled All about the Symmetry454 Calendar Leap Week, introduces various leap rules that could be used with the Symmetry454 Calendar — most could just as easily be adapted to almost any other calendar.
This document includes the full "soup mix" of new leap rules: the Rotation-Adjusted Year (RAY), Revised Julian variant of the ISO standard leap rule (RJiso), mean and actual astronomical leap rules, and fixed arithmetic leap cycles for the Northward Equinox or North Solstice.
individual.utoronto.ca /kalendis/symmetry.htm   (998 words)

Henry argues that his proposal will succeed where others have failed because it is the only one that keeps the weekly cycle perfectly intact and therefore respects the Fourth Commandment.
However, other calendar proposals that intercalate entire weeks do exist, such as the Symmetry454 calendar.
He advocates transition to the calendar on January 1st, 2006 as that is a year in which his calendar and the Gregorian calendar begin the year in sync.
www.reference.com /browse/wiki/Common-Civil-Calendar-and-Time   (371 words)

 Spotlight Radio:
The Symmetry454 calendar is similar to the Gregorian calendar in a few ways.
First, the Symmetry454 calendar is the same every year.
Fourth, experts say the Symmetry454 calendar is easier to use, and satisfies everyone's different needs.
www.spotlightradio.net /script.php?id=1106   (990 words)

My Symmetry454 has month lengths of 4-5-4 weeks, and the leap week has no name because it is simply appended to December in leap years.
In the past my "Classic" Symmetry Calendar had month lengths of 30-31-30 days and the leap week was separate at the end of the year, dubbed "Irvember", a name that was invented by a family member ridiculing my calendar at the Passover sedar last year, to the great delight of all present.
If it has no decimals then it refers to 00:00h UT. If you make it have.5 as a decimal then it refers to 12:00h UT, etc., and as you change it you can see the effect on the solar longitude and lunar phase that is displayed in that window.
www.geocities.com /Athens/1584/luachmail.html   (19619 words)

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