Calculate week number (DIN EN 28601)

HI,
how can I calculate the proper week number for Germany? So the first
week in year is the week with at least four days (Thursday at least
01.01). So I have some problems with leap years and so on. One of the
problems is to know that the last days of a year can be in the first
week of next year (such as 31.12.2002).
Who can help me?
Thanks and best regards
Marco

JB wrote:
Yes, this is a great VI ! Thanks Rolf !
However, we have modified it sligthly to handle some strange cases that may occur.
One
of those strange cases was the first day of this year.
The weeknumber was 52 and the year 2006. Although both are
correct, you will get an erroneous date if you combine them. In fact,
if you label a product with this date, the customer will think that it
was produced the last week of 2006.
In this case, you must either change the weeknumber to 1 or the year to 2005.
There are some other modifications like the input type of the date that we changed to a time stamp control.
What
you did are practical modifications but they are not to the definition
of the ISO norm. If you modify week to 1 the supposed date is one week
later than what ISO really means and only if you change year to 2005
are you sort of correct.
I didn't use the time stamp string because this function was written in
a LabVIEW version that hadn't a timestamp type and can be loaded in
such LabVIEW versions AFAIR.
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

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how to calculate week number from system date ?
thanks.
SK

hi,
The above FM can be used for BADI or customer exit, if it is design level then you can use formula as well, under formula date functions you can use DATE_TO_WEEK.
regards,
Arvind.

XSLT Mapping: how to calculate Week number of the year from given date

Hi,
I have input as date, i need to know the Week number from that date in XSLT Coding.
for Eg: if date is 29-12-2009 it should give 53rd week of the year.
All answers will be appreciated.
Regards,
Mayank

Hi add this statement to your XSLT Mappping
<xsl:stylesheet version="1.0" xmlns:java="http://xml.apache.org/xslt/java" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" exclude-result-prefixes="java">
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Week number calculations not working ...

Why doesn the week number calculation (ISO 8601) using datepart ('ww',#date#,crMonday,crFirstFourDays) not work?
As an example do the following formula:
DatePart('ww',CDate(2005,1,1),crMonday,crFirstFourDays)
The result is 9363, quite an impressive week number
This is an issue in versions 2008, XI R2, XI, 10 and possibly previous versions too

Hi Raghavendra
No I want to be able to calculate week number according to the week numbering definition from ISO 8601 - have a look at [http://en.wikipedia.org/wiki/ISO_week_date|http://en.wikipedia.org/wiki/ISO_week_date]
If you want to use datepart ('ww, ... to solve this,
you have to specify crMonday as third argument and crFirstFourDays as argument number 4 to tell datepart that weeks starts on mondays and week #1 is the one with the first 4 days of the year.
Doing this makes my example date used with datepart returns the week number 9363!!
The DatePart('ww',CDate(2005,1,1),crMonday,crFirstFourDays) is supposed to return 53!!
Weeknumbers are supposed to be between 1 and 52 or 53 depending of the year.
Be aware weeks number 1, 52 and 53 very often contains days from 2 consequtive years, when defined according to ISO 8691.
Your suggestion does not take into account the fact Weeks start on mondays and january 1st is not always the first day of week 1.
It returns week number 1
In fact it seems every day in the start of a year with weeknumber starting in the previous year gets the weeknumber calculated wrong.
Regards,
Poul
Do you want to calculate the weeknumber of a particular date? If so please try datepart('ww',CDate(2005,1,1)).
If not could you please explain me what you are trying to calculate and what output you are expecting?
Regards,
Raghavendra

ABAP Get Week Number for a Given Date.

Hi All,
I want to calculate week number for given date.
SAP has provided function modules like DATE_GET_WEEK.. Etc are giving week number. taking default start day as Monday. But for my requirement is calculate week number based on start day as Sunday.
Please let me know if we have any custom logic ??
Thanks & Regards
Vasu Yadav

Hi Vasu,
SAP standard functionality takes MONDAY as first day.
But if you want then you can change it to SUNDAY by implementing BADI CALENDAR_DEFINITION. Create a new implementation for method IF_CALENDAR_DEFINITION~GET_FIRST_DAY_OF_WEEK and assign value as SUNDAY.
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Thanks
Saurabh Kabra

How to calculate start date of the week based on week number ?

i need to get week number of the current date and based on that i need to calculate start date falling in the same week for last year.
Eg. today is 31st week of year and 31st july date. so what will be the date on the 31st week of last year. i need the start date of that week.
we can calculate the week number by select to_char(sysdate,'ww') from dual.
DO we have a single line query for that or will it require writing a pl/sql block ?

you can try following query
it can be as inline but for more clean look and create it as select with include select
with t as
(select sysdate as dt from dual)
select to_char(prev_year_dt - to_char(prev_year_dt, 'D') + 1, 'DD.MM.YYYY') as start_of_week from (select
-- get day from prev year with the same week number
    case
           when to_number(to_char(add_months(dt, -12), 'WW')) > to_number(to_char(dt, 'WW')) then
            dt - (to_number(to_char(add_months(dt, -12), 'WW')) - to_number(to_char(dt, 'WW'))) * 7
           when to_number(to_char(add_months(dt, -12), 'WW')) < to_number(to_char(dt, 'WW')) then
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       end as prev_year_dt
from t) t1good luck
Sergii
'Monday' is not first day of week in 100% ;)
Edited by: Galbarad on Jul 30, 2012 11:00 PM

Urgent ---calculate version from the current week number

hi,
i have an requrenment to modify the charasteric routines
i have xxx table with parameter i have to read this paramater n if this parameter contains value 'D' then calculate version(eg:- A00,A01 ...) from the current week number.
pls advice me which FM i have to call or provide me with some sample codeing.
points wil be rewarded
ravi

There is a FM "WEEKNR_GET".
This will give you the week no. You need to read the param value from the table that you mentioned and call this FM and updat the version.
You will need a ABAP person to do this.
Ravi Thothadri

Calendar to get week number of current month

Hi All,
Description: Currently I am working on an application which require to calculate some data for current month from a database where I have the data of all the previous and current month of that year, I can take week number as criteria.
Help Required: I can find week of month or year using Calendar methods but how to find the first week on the current month only.
Lets suppose the current month is April so when I use, int weekofmonth = cal.get(cal.WEEK_OF_MONTH);
it will return me the number of present week however I want to get what would be the week number at the start of the month (April).
Hope I am able to describe my query properly.
Thanks in advance.
Amit

/ ====================================================
Method: Get the desired Date format for the date
Developed By: Sandip Waghole [29-Jan-2010]
==================================================== /
public String getWeekNo(String strDate)
// input Date Format : M/dd/yyyy
int weekNo=0,i=0;
String strWeekNo=null;
int noOfDaysInTheYear=365;
int WEEK_STARTS_ON = 1; // Define the day on which week starts Sunday/Monday 1:Sunday 2:Monday
int firstDayNoInFirstWeekOfPresentYear=0; // Inititalize teh day on which week is starting in present year
int firstDayOfPresentYear=0; // Inititlize the 1st day of the present year whether Sunday/Monday/.....
int[] monthDaysArray = {31,28,31,30,31,30,31,31,30,31,30,31}; // Define array of the days as per months
int todaysDayNoInPresentYear=0;
int daysLateByFirstWeekStartedAfterYearStarted=0;
int intTemp=0;
//strDate="08/24/2000"; // For test purpose
StringTokenizer strDateTok = new StringTokenizer(strDate, "/ ");
int month = Integer.parseInt(strDateTok.nextToken());
int day= Integer.parseInt(strDateTok.nextToken());
int year = Integer.parseInt(strDateTok.nextToken());
GregorianCalendar cal = new GregorianCalendar();
// Check if present year is leap year
boolean boolIsLeapYear = cal.isLeapYear(year);
// If it is boolean year then add 1 to total days in the year & add one more day to february
if(boolIsLeapYear)
noOfDaysInTheYear=noOfDaysInTheYear+1;
monthDaysArray[1]=monthDaysArray[1]1;
// Find the 1st day of this year
Calendar calObj = new GregorianCalendar(year, Calendar.JANUARY, 1);
firstDayOfPresentYear = calObj.get(Calendar.DAY_OF_WEEK);
int intRemoveNoOfDaysFromWeek=0;
// # Find the day no of prsent day
for(i=0;i<month;i+) // get no of days till present year
intTemp = intTemp monthDaysArray;
todaysDayNoInPresentYear = intTemp - (monthDaysArray[month-1]-day);
if(firstDayOfPresentYear==6 || firstDayOfPresentYear==7) // If first Day is Friday or Saturday then it is week
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firstDayNoInFirstWeekOfPresentYear = 7 - firstDayOfPresentYear WEEK_STARTS_ON 1;
// Find delay in the 1st week start after r=the year start
daysLateByFirstWeekStartedAfterYearStarted = firstDayNoInFirstWeekOfPresentYear - 1;
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weekNo = (Integer)((todaysDayNoInPresentYear-daysLateByFirstWeekStartedAfterYearStarted)/7);
// Find the day no of today
intTemp = (todaysDayNoInPresentYear-daysLateByFirstWeekStartedAfterYearStarted) % 7;
if(intTemp > 0)
weekNo=weekNo+1;
else
weekNo=weekNo;
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firstDayNoInFirstWeekOfPresentYear=firstDayOfPresentYear;
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weekNo = (Integer)((todaysDayNoInPresentYear-intRemoveNoOfDaysFromWeek)/7);
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intTemp = (todaysDayNoInPresentYear-intRemoveNoOfDaysFromWeek) % 7;
weekNo = weekNo +1; // As 1st weeks days are reduced from the todays day no in the year
if(intTemp > 0)
weekNo=weekNo+1;
else
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return strWeekNo;
// Any issues please mail on [email protected] or [email protected]

Week Number of the current week...URGENT

hi gurus,
I want to calculate the week number of the current week as per Fiscal year.
What variable or the Customer Exit code needs to be written for it?
regards

Hi Venu,
   Use the code below. I assume that the client is US based where the Fiscal Year starts 1st October every year. Just in case the fiscal year starts in some other month then adjust the code (if SY-DATUM+4(2) >= 10.) below. Hope this helps.
DATA: PFY(8)   TYPE C.
DATA: CFY(4)   TYPE C.
DATA: LFY      TYPE I.
DATA: FYD      TYPE I.
DATA: TWD      TYPE I.
DATA: RES      TYPE I.
if SY-DATUM+4(2) >= 10.
concatenate SY-DATUM+0(6)
              '01'
         into PFY.
else.
LFY = SY-DATUM+0(4).
LFY = LFY - 1.
CFY = LFY.
concatenate CFY
              SY-DATUM+4(2)
              '01'
         into PFY.
endif.
FYD = P_FY.
TWD = SY-DATUM.
RES = ( TWD - FYD ) / 7.
Write: Res.

How do I look for a date that corresponds to a particular Week Number in a table?

Hello,
I have a table (Table A) that looks like this (I am only including the first 5 months to keep image size down):
The numbers in the table are dates, with custom formatting to just show the day.
I have another table with all of the Week Numbers for a given year in the first column and a second column in which I would like a formula to count the numbers of dates in Table A that correspond to the Week Number in the first column (i.e. the number of dates that falls within that week).
The following statement works for testing single cells:
=COUNTIF(WEEKNUM(Table A :: $Session 1 $January,2),A1)
But it would seem that I can only use this with single cells and not the table as a whole.
Could someone help with a solution to this?
Thanks,
Nick

Thanks Jerry. If I have understood you correctly I would need to calculate the week numbers of the dates in Table A in Table A itself, like this:
Then I would use the COUNTIF function to test the array of week numbers in Table A. If this is correct, I am not sure how to construct an array that includes just the cells with week numbers. I presume I could do this either manually or based on the value in the first column of Table A (i.e. just testing the five columns to the right of each "Week No" row), but I'm not sure.
Nick

Problem in week number

Hi,
We are using BO XI R2 Desktop intelligence to create a report.
I tried to create a variable week.It is giving wrong week number.
It is calculating the week from Monday to sunday.
But i need to calculate the week from Sunday to Saturday.
I need to change that.Is there anyway to change this?
The week number for the date 3rd Feb,2008 is 5.But in my report it is showing as 4.
Where i have to change the settings?
Please help on this.
Thanks,
Indu.

Indu,
There is no setting in WebI that you can use to overcome this "problem".
The solution that many developers employ is in adding a "business calendar" table to their data warehouse. In your case you are interested in the date and its mapping to a week so you would thus create two columns in your business calendar table, one with every date of the year and the other column with its corresponding week indicator. You will have to populate this business calendar table with all dates that are particular to your operation (past and future) to encompass a full reporting capability. Most developers sometimes also embellish this table with things like business Fiscal Year indicators, business day, weekend, and holiday indicators, etc, etc.
Thanks,
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Calculate Weeks in a period

Hi All,
How do I calculate the number of weeks in a given period.
say for example
startDate = 24th Nov 2002
enddate = 31st dec 2002.
How can I find the weeks within this period.
I tried calculating the time difference but that didn't help.
Any Ideas?

codingMonkey wrote:
gcameo wrote:
Weeks as in calendar weeks (Sunday - Saturday = 1 week) or just seven consecutive days (Wednesday - Tuesday = 1 week)?7 Consecutive daysThe easiest way, without using a third party library, in my opinion is the following. Get the difference between the two dates in milliseconds, divide that by 1000 to get seconds, divide by that 60 to get minutes, and so forth until you get the difference in weeks. I'll leave it up to you to write the code. Good luck!
As always, there might be a class/method somewhere in the standard API which provides an easier way of doing this. If anyone knows of such a class or method, please enlighten me and the OP.I have used the Joda-time library extensively before for this kind of work but in my current company, "ReInvent the Wheel Limited", I can't use it...hence my struggles.
Anyway, thanks

How to display week number in a report

Hi,
I need to show the week number in a report and related sales data for that week. For example, starting from 01-JUL-2009 the week1 should show total of sales from 01-JUL-08-JUL.
Help please....
Thanks
A/A

If you are trying to extract the week number of the calender year...you can use..
sql> select to_char(sysdate,'WW') from dual;
TO
05and then group the sales figures by week...
sql> create table t(
2     target_date date,
3     sales       number);
Table created.
sql> begin
2     for i in 1..30 loop
3        insert into t values (sysdate-i,100*i);
4     end loop;
5   commit;
6 end;
7 /
PL/SQL procedure successfully completed.
sql> select week, sum(sales) from (
2     select sales, to_char(target_date,'WW') week from t)
3   group by week;
WE SUM(SALES)
05       2100
02      16800
01       8800
04       7000
03      11900However, if your week calculation starts with a particular date like a calender year starting with 01-june-2010, then you would need to calculate the (relative) week number using something like...
1 select target_date,
2         trunc(((target_date - to_date('01-june-2010','DD-MON-YYYY'))/7)) week_number
3*   from t
sql> /In the above code, 01-june-2010 is the date from which my calender year starts.
Please note that since this is relative, you might get negative numbers for weeks.

Computing date of 1st Monday of a week given the week number?

I've got the week numbers (1-52) and would like to calculate the 1st monday given that week number. I'm hoping for a format like Jan 12
Is this possible to do?
ajw

this page appears to have a few formulas that you may be able to use: http://mathforum.org/dr.math/faq/faq.calendar.html
wikipedia also includes a few as well: http://en.wikipedia.org/wiki/Determination_of_the_day_of_the_week
Scott Brickey
MCTS, MCPD, MCITP
www.sbrickey.com
Strategic Data Systems - for all your SharePoint needs

How to format a date to display the ISO week number in BI Publisher ?

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I need to format a date to display the ISO week number in BI Publisher.
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I want the ISO week number (1-52 or 1-53), the one implemented by the 'IW' format mask of the Oracle PL/SQL TO_CHAR() function for example.
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Also, as I'm working on an RTF template, I've tried 'IW' as MS Word date format, but it is not recognised by MS Word :-((
Any help would be much appreciated,
Regards - Hugues

Hi,
Thank you for the post.
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Regards - Hugues

Calculate week number (DIN EN 28601)

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