RE: Week_ISO and the last week of 2008

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Walden
H. Leverich
Sent: Tuesday, January 06, 2009 11:48 AM
To: Midrange Systems Technical Discussion
Subject: Week_ISO and the last week of 2008

According to the spec week_iso should have returned 53 for the end of
2008. On V5R4 I'm getting 1. Can someone please try:

select week_iso(date('12/29/08')) from sysibm/sysdummy1

on their machine and let me know what they get.

Thanks,

-Walden

I can't help with that, but I found this defination of WEEK_ISO:

<QUOTE>
Returns the week of the year of the argument as an integer value in the
range 1-53. The week starts with Monday and always includes 7 days. Week
1 is the first week of the year to contain a Thursday, which is
equivalent to the first week containing January 4. It is therefore
possible to have up to 3 days at the beginning of a year appear in the
last week of the previous year. Conversely, up to 3 days at the end of a
year may appear in the first week of the next year.
</QUOTE>

From my reading, the week under consideration from the calendar had

2008-12-29 as a Monday. The Thursday of that same week was 2009-01-01.
Therefore, according to the second & third sentence, this was Week 1.
Had 2008-12-29 been a Tuesday, then this would have been week 53.


--
John McKown
Systems Engineer IV
IT

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