Comments on: Happy Leap Day! http://blogs.codegear.com/davidi/2008/02/29/38860 David Intersimone (David I) CodeGear blog about programming, languages, history, and more. Sat, 06 Sep 2008 07:26:58 +0000 http://wordpress.org/?v=wordpress-mu-1.2.3-2.2.1 By: Simon http://blogs.codegear.com/davidi/2008/02/29/38860#comment-9142 Simon Tue, 11 Mar 2008 12:07:06 +0000 http://blogs.codegear.com/davidi/2008/02/29/38860#comment-9142 IsLeapYear is a good example for novice programming. It may be greatly improved. see http://qc.borland.com/wc/qcmain.aspx?d=40715 IsLeapYear is a good example for novice programming.

It may be greatly improved.

see http://qc.borland.com/wc/qcmain.aspx?d=40715

]]> By: Anders E. Andersen http://blogs.codegear.com/davidi/2008/02/29/38860#comment-9068 Anders E. Andersen Mon, 03 Mar 2008 00:34:19 +0000 http://blogs.codegear.com/davidi/2008/02/29/38860#comment-9068 Not so fast Sirs! In Denmark the actual leap day is the 24th, not the 29th. This has no other practical significance, than where the note should be on the calender. :) Not so fast Sirs! In Denmark the actual leap day is the 24th, not the 29th. This has no other practical significance, than where the note should be on the calender. :)

]]> By: Richard Foersom http://blogs.codegear.com/davidi/2008/02/29/38860#comment-9043 Richard Foersom Fri, 29 Feb 2008 23:38:05 +0000 http://blogs.codegear.com/davidi/2008/02/29/38860#comment-9043 Leap years are difficult stuff ;-), take MS Excel as example. Excel use date numbering starting from 1900-01-01 as day 1. Try this: - Open MS Excel on a PC, any version will do - Format a cell as date format - Enter 60 as day number Result: A non existing day at the end of February 1900! BTW, according to MS there were also a day 0 in January 1900. OpenOffice Calc is compatible with the Excel numbering scheme, but only from 1900-03-01 onwards. Leap years are difficult stuff ;-), take MS Excel as example. Excel use date numbering starting from 1900-01-01 as day 1.

Try this:
- Open MS Excel on a PC, any version will do
- Format a cell as date format
- Enter 60 as day number

Result: A non existing day at the end of February 1900!

BTW, according to MS there were also a day 0 in January 1900.

OpenOffice Calc is compatible with the Excel numbering scheme, but only from 1900-03-01 onwards.

]]> By: Thomas Mueller http://blogs.codegear.com/davidi/2008/02/29/38860#comment-9037 Thomas Mueller Fri, 29 Feb 2008 13:55:54 +0000 http://blogs.codegear.com/davidi/2008/02/29/38860#comment-9037 Leap years are easy, but do you know how to calculate the week of the year? How is it defined? OK, even that is easy nowadays, there is the Internet to look it up. I guess that shows my age.... Leap years are easy, but do you know how to calculate the week of the year? How is it defined? OK, even that is easy nowadays, there is the Internet to look it up. I guess that shows my age….

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