[mso] Re: Determining leap year in Excel 2000
- From: "Ray Blake" <ray@xxxxxxxxx>
- To: <mso@xxxxxxxxxxxxx>
- Date: Wed, 14 Dec 2005 06:36:15 -0000
Robert,
You are going to have problems going back that far, because although the
Gregorian calendar was adopted in many countries as early as 1582,
Britain and America didn't switch until 1752. In order to synchronise,
11 days we dropped in September of that year.
Ray
------------------------------------
GR Business Process Solutions
Ray Blake
Head of Software Design
ray@xxxxxxxxx
Braedon
Newell Road
Hemel Hempstead
Herts HP3 9PD
tel: 01442 396518
fax: 01442 389353
mobile: 07834 226601
www.grbps.com
------------------------------------
-----Original Message-----
From: mso-bounce@xxxxxxxxxxxxx [mailto:mso-bounce@xxxxxxxxxxxxx] On
Behalf Of Robert Carneal
Sent: 14 December 2005 04:57
To: mso@xxxxxxxxxxxxx
Subject: [mso] Re: Determining leap year in Excel 2000
Ok, got it. After doing it on paper about 30 times, I think I can claim
I
understand it. My last question, does this approach work for all years?
Say
year 650 for example? What's the cutoff if any? (Please don't say 1900!)
My
dates (genealogy) go back to 1652, so let's assume I want to go back to
year
1550 or thereabouts. Thank you for your time.
Robert
-----Original Message-----
From: mso-bounce@xxxxxxxxxxxxx [mailto:mso-bounce@xxxxxxxxxxxxx]On
Behalf Of
Andrew the Owl
Sent: 2005-12-13 20:22
To: mso@xxxxxxxxxxxxx
Subject: [mso] Re: Determining leap year in Excel 2000
Robert,
In the Gregorian calendar, leap years fall on any year that either can
be
evenly divided by 400 or evenly divided by 4 and not evenly divided by
100.
1900 was not a leap year but 2000 was. In other words:
IF
[A]Year is exactly divisible by 400
OR
([B]Year is exactly divisible by 4 AND [C]Year is not exactly divisible
by
100)
...
for Year = 1900, [A] is false, [B] is true and [C] is false. ([B] AND
[C])
evaluates to false and ([A] OR false) evaluates to false.
Your formula is correct :)
(The Eastern Orthodox churches compute leap years by using another rule;
that a leap year is any year which number can be divided by 4 without a
remainder, and years ending in hundreds are leap years if a remainder of
2
or 6 occurs when such a year is divided by 9. A nice little puzzle to
keep
for after Christmas dinner!)
Andrew
*************************************************************
You are receiving this mail because you subscribed to mso@xxxxxxxxxxxxx or
MicrosoftOffice@xxxxxxxxxxxxxxxx
To send mail to the group, simply address it to mso@xxxxxxxxxxxxx
To Unsubscribe from this group, send an email to
mso-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the quotes) in
the subject line.
Or, visit the group's homepage and use the dropdown menu. This will also allow
you to change your email settings to digest or vacation (no mail).
//www.freelists.org/webpage/mso
To be able to use the files section for sharing files with the group, send a
request to mso-moderators@xxxxxxxxxxxxx and you will be sent an invitation with
instructions. Once you are a member of the files group, you can go here to
upload/download files:
http://www.smartgroups.com/vault/msofiles
*************************************************************
Other related posts:
