« Return to Thread: as of present time, is it still true that 4000 A.D. will NOT be a leap year?
Re: as of present time, is it still true that 4000 A.D. will NOT be a leap year?
by Karl Palmen
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Dear Irv and Calendar People
I’d expect this (i.e. whether a given year has a leap week
in a Symmetry454 calendar) to depend on (but not be completely determined
by) on the day of week of a the northward equinox (or any other given
equinox or solstice).
Assuming an equinox on 20 March 4000, this day of week is Monday
for the year 4000.
The 69/389 leap week cycle has an extremely low mean year of 365.241645
days.
This suggests that Monday is on the edge of the range of days of
week of the Northward equinox, whose year may have a leap week.
Karl
10(07(13
From: East Carolina University Calendar
discussion List [mailto:CALNDR-L@...] On Behalf Of Irv
Bromberg
Sent: 07 April 2009 15:09
To: CALNDR-L@...
Subject: Re: as of present time, is it still true that 4000 A.D. will
NOT be a leap year?
I
just noticed that of all fixed-arithmetic Symmetry454 leap cycles built into
the most recent public beta of Kalendis the only one that makes the year 4000 a
leap year is the symmetrically spread 69/389 leap cycle.
Note that 4000 is not a leap year according to ISO,
nor according to the almost symmetrical 71/400 cycle.
Scanned by iCritical.
« Return to Thread: as of present time, is it still true that 4000 A.D. will NOT be a leap year?
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