Re: [U2] [UV] Conversion code for week number
Thanks Martin. I've heard of several algorhythms similar to this and was curious what Pick used. Every time I tried my own expressions I either came up short on covering all dates or it was way too time consuming. Of course I wasn't writing it in assembler or other lower (faster) code either. Thanks. - Original Message - From: Martin Phillips [EMAIL PROTECTED] To: u2-users@listserver.u2ug.org Sent: Saturday, July 21, 2007 6:47 PM Subject: Re: [U2] [UV] Conversion code for week number Hi Mark, The U2 conversion code source code is not public so we can only guess. The method used by OpenQM was recently changed to correct problems with dates way back in history and is essentially as follows. It sounds complex but it is mostly just a series of division operations. 1. Add 718430 to the day number. This gives a datum of 1 January 0001 to simplify things. (QM documents that it doesn't support BC dates and that we don't allow for the calendar changes in 1752 or 1583 depending on where you live). 2. Divide by 146097 to work out how many 400 year cycles we have completed. This allows for the complications of leap year calculations. 3. Work out how many 100 year cycles we are into the remaining years from step 2. 4. Work out how many 4 year cycles we are into the remaining years from step 3. 5. Calcualte whole years into the current 4 year cycle. 6. Decide if this is a leap year. 7. Work out the calendar date within the year. 8. Now that we know the day/month/year, apply the conversion code to construct the actual date string. Our date conversions also have codes for 1st, 2nd, 3rd,... style dates and for ISO week numbers. The ISO week calculation is even more horrific but is well documented on the web (http://personal.ecu.edu/mccartyr/ISOwdALG.txt). Martin Phillips Ladybridge Systems Ltd 17b Coldstream Lane, Hardingstone, Northampton, NN4 6DB +44-(0)1604-709200 --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/ --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
Re: [U2] [UV] Conversion code for week number
In message [EMAIL PROTECTED], Martin Phillips [EMAIL PROTECTED] writes Hi Mark, The U2 conversion code source code is not public so we can only guess. The method used by OpenQM was recently changed to correct problems with dates way back in history and is essentially as follows. It sounds complex but it is mostly just a series of division operations. 1. Add 718430 to the day number. This gives a datum of 1 January 0001 to simplify things. (QM documents that it doesn't support BC dates and that we don't allow for the calendar changes in 1752 or 1583 depending on where you live). Or 1919 :-) I always like to point out that 2000 was the first century year since 1600 when Europe actually agreed whether it was a leap year or not. 2. Divide by 146097 to work out how many 400 year cycles we have completed. This allows for the complications of leap year calculations. I'd've thought you could handle the calendar change dead easy here... just have a cut-off date (user selectable :-) for the switch between calendars, and if it's before that date you apply a constant, while if it's after you apply this 400 correction. At the cost of one extra IF, you've now got accurate dates right back to start of the modern calendar. Cheers, Wol -- Anthony W. Youngman [EMAIL PROTECTED] 'Yings, yow graley yin! Suz ae rikt dheu,' said the blue man, taking the thimble. 'What *is* he?' said Magrat. 'They're gnomes,' said Nanny. The man lowered the thimble. 'Pictsies!' Carpe Jugulum, Terry Pratchett 1998 Visit the MaVerick web-site - http://www.maverick-dbms.org Open Source Pick --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
Re: [U2] [UV] Conversion code for week number
None of this explains how 12345 converts to 05/01/2001 (example) (or vice-versa) as blindingly fast as it always has. We all can write all the formulas that we want. I want to know what the 'Pick' method is. Unless it truly is a whole lot of adding and dividing. I thought that was clear in my original request. Thanks Mark Johnson - Original Message - From: Keith Johnson (DSLWN) [EMAIL PROTECTED] To: u2-users@listserver.u2ug.org Sent: Sunday, July 15, 2007 6:16 PM Subject: Re: [U2] [UV] Conversion code for week number Wol wrote INT (DAY / 365.25) will always give the correct number of years since day 0. The following shows that is not strictly true because of the centennial non-leap year. Test Program 001: ZZ = 0 002: FOR XX = 1 TO 5 003: Y1 = 1968 + INT((XX-1)/365.25) 004: Y2 = OCONV(XX,'DY') 005: IF Y1 NE Y2 THEN 006:ZZ += 1 007:CRT ZZ,XX,OCONV(XX,'D') 008: END 009: NEXT XX Results 1 48579 01 JAN 2101 2 48944 01 JAN 2102 3 49309 01 JAN 2103 4 49674 01 JAN 2104 I vaguely remember a comment a long time ago (maybe in c.d.p?) that the date was chosen _because_ it was a leap year that started on a Sunday and that this helped in converting dates from other IBM formats for the GIRLS/GIM project. Regards, Keith --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/ --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
Re: [U2] [UV] Conversion code for week number
Hi Mark, The U2 conversion code source code is not public so we can only guess. The method used by OpenQM was recently changed to correct problems with dates way back in history and is essentially as follows. It sounds complex but it is mostly just a series of division operations. 1. Add 718430 to the day number. This gives a datum of 1 January 0001 to simplify things. (QM documents that it doesn't support BC dates and that we don't allow for the calendar changes in 1752 or 1583 depending on where you live). 2. Divide by 146097 to work out how many 400 year cycles we have completed. This allows for the complications of leap year calculations. 3. Work out how many 100 year cycles we are into the remaining years from step 2. 4. Work out how many 4 year cycles we are into the remaining years from step 3. 5. Calcualte whole years into the current 4 year cycle. 6. Decide if this is a leap year. 7. Work out the calendar date within the year. 8. Now that we know the day/month/year, apply the conversion code to construct the actual date string. Our date conversions also have codes for 1st, 2nd, 3rd,... style dates and for ISO week numbers. The ISO week calculation is even more horrific but is well documented on the web (http://personal.ecu.edu/mccartyr/ISOwdALG.txt). Martin Phillips Ladybridge Systems Ltd 17b Coldstream Lane, Hardingstone, Northampton, NN4 6DB +44-(0)1604-709200 --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
Re: [U2] [UV] Conversion code for week number
Please disregard and forget what I wrote below. It just isn't true. The formula will fail on some odd dates. The reason is that the average lenth of a calendar year is not constant but depends on the year interval used . E.g. 2000-2099 has an average year of 365.25 but 2000-2399 has 365.247525 Sorry. -- mats Mats Carlid skrev: A final (?) note on year calculation shortcuts: Had Dick chosen jan 1 in a year divisible by 400 as day 1 then INT(DAY / 365.247525 ) would have worked all the time. But selecting a '400-year' starting on a sunday would result in quite long internal dates unless year 2000 started on a sunday ( it didn't). 365.25 can only work for a limited time as it doesn't observe the 100 and 400 year rules ... -- mats --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/ --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
Re: [U2] [UV] Conversion code for week number
A final (?) note on year calculation shortcuts: Had Dick chosen jan 1 in a year divisible by 400 as day 1 then INT(DAY / 365.247525 ) would have worked all the time. But selecting a '400-year' starting on a sunday would result in quite long internal dates unless year 2000 started on a sunday ( it didn't). 365.25 can only work for a limited time as it doesn't observe the 100 and 400 year rules ... -- mats --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
Re: [U2] [UV] Conversion code for week number
Wol wrote INT (DAY / 365.25) will always give the correct number of years since day 0. The following shows that is not strictly true because of the centennial non-leap year. Test Program 001: ZZ = 0 002: FOR XX = 1 TO 5 003: Y1 = 1968 + INT((XX-1)/365.25) 004: Y2 = OCONV(XX,'DY') 005: IF Y1 NE Y2 THEN 006:ZZ += 1 007:CRT ZZ,XX,OCONV(XX,'D') 008: END 009: NEXT XX Results 1 48579 01 JAN 2101 2 48944 01 JAN 2102 3 49309 01 JAN 2103 4 49674 01 JAN 2104 I vaguely remember a comment a long time ago (maybe in c.d.p?) that the date was chosen _because_ it was a leap year that started on a Sunday and that this helped in converting dates from other IBM formats for the GIRLS/GIM project. Regards, Keith --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
Re: [U2] [UV] Conversion code for week number
In message [EMAIL PROTECTED], Timothy Snyder [EMAIL PROTECTED] writes I know you said don't tell me it's the base date, but the date 1/1/68 was chosen for a reason - it means divide by 365.25 actually gives the right answer... Anybody that relies on that in code is bound to get a nasty surprise. There are dates for which that doesn't work. Try it with July 7, 2006. Today's date is 14437, a year ago was 14072. The difference is 365. Divide that by 365.25 and you get less than one year. The argument could be made that you could round it after the division, but that will throw other dates off. The bottom line is that this is not a safe way to accurately calculate an age - it's *almost* always right, but when that's not good enough, it shouldn't be used. Yes, but that's not quite what I was thinking ... INT (DAY / 365.25) will always give the correct number of years since day 0. The other thing I forgot, was MOD( DAY, 7) gives you the day of the week, too, iirc. Any road, day 0 was chosen to make date arithmetic as simple as possible. Cheers, Wol -- Anthony W. Youngman [EMAIL PROTECTED] 'Yings, yow graley yin! Suz ae rikt dheu,' said the blue man, taking the thimble. 'What *is* he?' said Magrat. 'They're gnomes,' said Nanny. The man lowered the thimble. 'Pictsies!' Carpe Jugulum, Terry Pratchett 1998 Visit the MaVerick web-site - http://www.maverick-dbms.org Open Source Pick --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
RE: [U2] [UV] Conversion code for week number
This is silly and a bit off-topic - but I remember the day I found out that you could perform a date conversion in Universe to get the Chinese year! I had so much fun adding The Year of the Pig at the top of all the reports at the customer site where I was working at the time. I wonder if they are still seeing that on some of their reports. geek giggle --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
RE: [U2] [UV] Conversion code for week number
Actually that was one of my earliest support calls to VMARK, and AFAIK it still ain't fixed.. The Chinese year does not change on the 1st of January... Brian Year of the Horse (or just an old nag) This is silly and a bit off-topic - but I remember the day I found out that you could perform a date conversion in Universe to get the Chinese year! I had so much fun adding The Year of the Pig at the top of all the reports at the customer site where I was working at the time. I wonder if they are still seeing that on some of their reports. geek giggle --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/ --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
RE: [U2] [UV] Conversion code for week number
What was that Susan? A tee-hee-SNORRRT! Tee-hee-SNORRRT! -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Susan Joslyn Sent: Friday, July 13, 2007 8:16 AM To: u2-users@listserver.u2ug.org Subject: RE: [U2] [UV] Conversion code for week number This is silly and a bit off-topic - but I remember the day I found out that you could perform a date conversion in Universe to get the Chinese year! I had so much fun adding The Year of the Pig at the top of all the reports at the customer site where I was working at the time. I wonder if they are still seeing that on some of their reports. geek giggle --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/ --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
Re: [U2] [UV] Conversion code for week number
Hi all, Apologies if I am diving in late after this has already been said Although there are many different interpretations of week number, the most widely used is the ISO week number as printed in many diaries, etc. This was discussed in detail a couple of months back either on this list or on CDP, I forget which. You should be able to find it in the digests. We had used a simple algorithm in our business applications for some years (and published it in our U2 programming classes) only to find that it stopped working a couple of years back. This forced us to do the research and find the full algorithm. We implemented this as a standard conversion code in OpenQM and were surprised to find that the algorithm is far from simple, however, it is widely available on the web. Simply dividing by 365.25 does not work especially when you take into account the possibility of doing the calculation on Feb 29. Martin Phillips Ladybridge Systems Ltd 17b Coldstream Lane, Hardingstone, Northampton, NN4 6DB +44-(0)1604-709200 --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
RE: [U2] [UV] Conversion code for week number
Fairly simple; The iconv opens up a worm hole sends the date information through to a super computer in the future which cranks out an answer and sends it back to the iconv a fraction of a second later. -Original Message- From: MAJ Programming [mailto:[EMAIL PROTECTED] Sent: Wednesday, July 11, 2007 8:08 PM To: u2-users@listserver.u2ug.org Subject: Re: [U2] [UV] Conversion code for week number So we're guessing. I gotta believe that there's something to it instead of simply counting days, dividing by 365.25, carrying the 3, square root of October etc. How does 1/1/68 mean 'divide by 365.25'? Also, divide 'what' by 365.25 ? Considering how incredibly often the function is used and how blazingly fast it does its ICONVs and OCONVs, there must be something more to it. Thanks - Original Message - From: Timothy Snyder [EMAIL PROTECTED] To: u2-users@listserver.u2ug.org Sent: Wednesday, July 11, 2007 12:06 PM Subject: RE: [U2] [UV] Conversion code for week number I know you said don't tell me it's the base date, but the date 1/1/68 was chosen for a reason - it means divide by 365.25 actually gives the right answer... Anybody that relies on that in code is bound to get a nasty surprise. There are dates for which that doesn't work. Try it with July 7, 2006. Today's date is 14437, a year ago was 14072. The difference is 365. Divide that by 365.25 and you get less than one year. The argument could be made that you could round it after the division, but that will throw other dates off. The bottom line is that this is not a safe way to accurately calculate an age - it's *almost* always right, but when that's not good enough, it shouldn't be used. Tim Snyder Consulting I/T Specialist U2 Lab Services Information Management, IBM Software Group --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/ --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/ --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
RE: [U2] [UV] Conversion code for week number
Hi All This may help to build a function for conv code. PRINT DATE : INPUT DATE D = ICONV(DATE,D2) YY = OCONV(D,'D4 Y') YEAR.START = ICONV(01 JAN :YY,D4) ;* First day of the year D = D - YEAR.START+1+MOD(YEAR.START,7);* Use the Mod 7 for calendar week PRINT WEEK :INT(D/7)+1 Regards David Jordan --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
Re: [U2] [UV] Conversion code for week number
There isn't one, and for a very good reason - you have to nail the business rules, and these won't be the same everywhere. For example, on what dat does your week start? It's Sunday for you (I assume, since you're in Australia), but it's Monday in the USA. Some businesses run Thursday through Wednesday as their week. The other business rule is the definition of week number 1 in the year. Assuming that you want to implement the ISO 8601 standard format Wnn, in which every week has seven days, you must decide some kind of rule for week number 1 - for example the first week that has four dates in the calendar year. Using such a rule January 1st is often in week #53 of the preceding year. Of course, if you don't require seven days in every week, and week number 1 starts on January 1st, then you can go with something like Int(Oconv(TheDate, DJ) / 7) --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
Re: [U2] [UV] Conversion code for week number
Likewise for the business definitions of months and years. I've got clients that have 13 EVEN 4 week months and one has 12 'months' offset by no-one knows why days and an off year. For example, today, July 11, 2007 is period 06/08, meaning period 06 in year '08'. I ain't making this stuff up. The 13 EVEN 4 weeks months client has a parent company in Holland. The 06/08 client has their HQ in USA and offices in Belgium and China. Go figure. It's heavily dependent on control tables as I haven't been able to create a calculation using a base date and constants to tell me what period September 27, 2004 was in. BTW this was one of those Y2K things that didn't get resolved, ie the 06/08, so theres dozens of dict items for sorting in the long-term history files. One of my client's software REQUIRES that the end of month processing is performed exactly on the last day of the month, regardless if it's a saturday, sunday or New Year's Eve. Who were the brain surgeons that wrote this? I've offered to add some hamburger helper but they wouldn't pay for it as it's the way it's always been... Finally, what is the calculation that MV uses for its internal dates? (Don't bother telling me the base date, what's the calculation? I don't think it's Thirty days hath September...) I've heard it called Zeller's Congruence and I've looked it up but didn't get the direct connection to how our dates are incredibly fastly derived/converted. Thanks in advance Mark Johnson - Original Message - From: Ray Wurlod [EMAIL PROTECTED] To: u2-users@listserver.u2ug.org Sent: Wednesday, July 11, 2007 2:00 AM Subject: Re: [U2] [UV] Conversion code for week number There isn't one, and for a very good reason - you have to nail the business rules, and these won't be the same everywhere. For example, on what dat does your week start? It's Sunday for you (I assume, since you're in Australia), but it's Monday in the USA. Some businesses run Thursday through Wednesday as their week. The other business rule is the definition of week number 1 in the year. Assuming that you want to implement the ISO 8601 standard format Wnn, in which every week has seven days, you must decide some kind of rule for week number 1 - for example the first week that has four dates in the calendar year. Using such a rule January 1st is often in week #53 of the preceding year. Of course, if you don't require seven days in every week, and week number 1 starts on January 1st, then you can go with something like Int(Oconv(TheDate, DJ) / 7) --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/ --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
RE: [U2] [UV] Conversion code for week number
Zeller's Congruence finds the day of the week and, at least on UV, isn't the same as what we use. It is 0 - 6, 0 is Saturday, and UV is 1 - 7, 1 is Monday. -Original Message- From: MAJ Programming [mailto:[EMAIL PROTECTED] Sent: Wednesday, July 11, 2007 8:17 AM To: u2-users@listserver.u2ug.org Subject: Re: [U2] [UV] Conversion code for week number SNIP Finally, what is the calculation that MV uses for its internal dates? (Don't bother telling me the base date, what's the calculation? I don't think it's Thirty days hath September...) I've heard it called Zeller's Congruence and I've looked it up but didn't get the direct connection to how our dates are incredibly fastly derived/converted. Thanks in advance Mark Johnson --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
RE: [U2] [UV] Conversion code for week number
I know you said don't tell me it's the base date, but the date 1/1/68 was chosen for a reason - it means divide by 365.25 actually gives the right answer... Cheers, Wol -Original Message- From: MAJ Programming [mailto:[EMAIL PROTECTED] Sent: 11 July 2007 14:17 To: u2-users@listserver.u2ug.org Subject: Re: [U2] [UV] Conversion code for week number Finally, what is the calculation that MV uses for its internal dates? (Don't bother telling me the base date, what's the calculation? I don't think it's Thirty days hath September...) I've heard it called Zeller's Congruence and I've looked it up but didn't get the direct connection to how our dates are incredibly fastly derived/converted. Thanks in advance Mark Johnson --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
RE: [U2] [UV] Conversion code for week number
I know you said don't tell me it's the base date, but the date 1/1/68 was chosen for a reason - it means divide by 365.25 actually gives the right answer... Anybody that relies on that in code is bound to get a nasty surprise. There are dates for which that doesn't work. Try it with July 7, 2006. Today's date is 14437, a year ago was 14072. The difference is 365. Divide that by 365.25 and you get less than one year. The argument could be made that you could round it after the division, but that will throw other dates off. The bottom line is that this is not a safe way to accurately calculate an age - it's *almost* always right, but when that's not good enough, it shouldn't be used. Tim Snyder Consulting I/T Specialist U2 Lab Services Information Management, IBM Software Group --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
Re: [U2] [UV] Conversion code for week number
So we're guessing. I gotta believe that there's something to it instead of simply counting days, dividing by 365.25, carrying the 3, square root of October etc. How does 1/1/68 mean 'divide by 365.25'? Also, divide 'what' by 365.25 ? Considering how incredibly often the function is used and how blazingly fast it does its ICONVs and OCONVs, there must be something more to it. Thanks - Original Message - From: Timothy Snyder [EMAIL PROTECTED] To: u2-users@listserver.u2ug.org Sent: Wednesday, July 11, 2007 12:06 PM Subject: RE: [U2] [UV] Conversion code for week number I know you said don't tell me it's the base date, but the date 1/1/68 was chosen for a reason - it means divide by 365.25 actually gives the right answer... Anybody that relies on that in code is bound to get a nasty surprise. There are dates for which that doesn't work. Try it with July 7, 2006. Today's date is 14437, a year ago was 14072. The difference is 365. Divide that by 365.25 and you get less than one year. The argument could be made that you could round it after the division, but that will throw other dates off. The bottom line is that this is not a safe way to accurately calculate an age - it's *almost* always right, but when that's not good enough, it shouldn't be used. Tim Snyder Consulting I/T Specialist U2 Lab Services Information Management, IBM Software Group --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/ --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
RE: [U2] [UV] Conversion code for week number {unclassified}
Adrian, This has been discussed before on the list. IIRC, there is no built-in U2 support (i.e. conversion code) for this, at least partly because it's one of those nasty 'depends what you mean' questions. For example, * is the first week in the year week # 0 or 1? * when does the first week start - the first day in the year, the first Sunday in the year, the first Monday, ... ? There is I believe an ISO standard, but that may not be what you want. There may be something in Pickwiki Regards Mike -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Womack, Adrian Sent: Wednesday, 11 July 2007 3:07 p.m. To: u2-users@listserver.u2ug.org Subject: [U2] [UV] Conversion code for week number Does anyone know of a conversion code that returns the week number of the year? The information contained in this Internet Email message is intended for the addressee only and may contain privileged information, but not necessarily the official views or opinions of the New Zealand Defence Force. If you are not the intended recipient you must not use, disclose, copy or distribute this message or the information in it. If you have received this message in error, please Email or telephone the sender immediately. --- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
RE: [U2] [UV] Conversion code for week number {unclassified}
Thanks for that Mike. I'd forgotten about pickwiki.
I found this function which should do the trick:
http://www.pickwiki.com/cgi-bin/wiki.pl?IsoWeekNum
Thanks,
Adrian
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of HENDERSON MIKE,
MR
Sent: Wednesday, 11 July 2007 12:14 PM
To: u2-users@listserver.u2ug.org
Subject: RE: [U2] [UV] Conversion code for week number {unclassified}
Adrian,
This has been discussed before on the list.
IIRC, there is no built-in U2 support (i.e. conversion code) for this,
at least partly because it's one of those nasty 'depends what you mean'
questions.
For example,
* is the first week in the year week # 0 or 1?
* when does the first week start - the first day in the year, the first
Sunday in the year, the first Monday, ... ?
There is I believe an ISO standard, but that may not be what you want.
There may be something in Pickwiki
Regards
Mike
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