Comments on: Calculating The Week Number In Excel http://www.lifehacker.com.au/2009/07/calculating-the-week-number-in-excel/ tips and downloads to help you at work and play Mon, 23 Nov 2009 00:14:26 +1100 http://wordpress.org/?v=2.8.6 hourly 1 By: Adam Brownsea http://www.lifehacker.com.au/2009/07/calculating-the-week-number-in-excel/comment-page-1/#comment-11038 Adam Brownsea Thu, 02 Jul 2009 07:13:19 +0000 http://www.lifehacker.com.au/?p=337076#comment-11038 Angus, I did some tests and your initial findings may have been incorrect. The correct format for WEEKNUM is to include a full date in the first field. Therefore the following =WEEKNUM(DATE(2009,07,01),1) =WEEKNUM(DATE(2009,07,01),2) return the same result. Angus,

I did some tests and your initial findings may have been incorrect. The correct format for WEEKNUM is to include a full date in the first field.

Therefore the following
=WEEKNUM(DATE(2009,07,01),1)
=WEEKNUM(DATE(2009,07,01),2)
return the same result.

]]> By: Adam Brownsea http://www.lifehacker.com.au/2009/07/calculating-the-week-number-in-excel/comment-page-1/#comment-11037 Adam Brownsea Thu, 02 Jul 2009 06:45:48 +0000 http://www.lifehacker.com.au/?p=337076#comment-11037 Actually it does. If the week begins on a Monday, the week with 1st of Jan would be week one, containing 4 days from January with Thu, Fri, Sat and Sun. Actually it does. If the week begins on a Monday, the week with 1st of Jan would be week one, containing 4 days from January with Thu, Fri, Sat and Sun.

]]> By: Angus Kidman http://www.lifehacker.com.au/2009/07/calculating-the-week-number-in-excel/comment-page-1/#comment-11036 Angus Kidman Thu, 02 Jul 2009 06:38:25 +0000 http://www.lifehacker.com.au/?p=337076#comment-11036 Not quite -- the European (ISO) standard also specifies the week starts on a Monday, so this scenario wouldn't happen. Not quite — the European (ISO) standard also specifies the week starts on a Monday, so this scenario wouldn’t happen.

]]> By: Adam Brownsea http://www.lifehacker.com.au/2009/07/calculating-the-week-number-in-excel/comment-page-1/#comment-11035 Adam Brownsea Thu, 02 Jul 2009 06:36:24 +0000 http://www.lifehacker.com.au/?p=337076#comment-11035 I was interested to read what week the 31st of Dec and 1st of January fall into. Seems the European standard is Week 1 starts with the first week with 4+ days within. If using the Sunday rule, the week containing the 1st of Jan this year was a Thursday meaning that week only had Thur, Fri and Sat, therefore not matching the 4+ rule, so becomes week 53 of 2008. The first week would began on Sunday 4th of Jan. I was interested to read what week the 31st of Dec and 1st of January fall into.

Seems the European standard is Week 1 starts with the first week with 4+ days within. If using the Sunday rule, the week containing the 1st of Jan this year was a Thursday meaning that week only had Thur, Fri and Sat, therefore not matching the 4+ rule, so becomes week 53 of 2008. The first week would began on Sunday 4th of Jan.

]]>