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Know the number of the week for a date

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# 1  
Old 11-29-2011
Know the number of the week for a date
Hi,

I tried to find the solution on the forum without success.
datecalc from Perderabo doesn't solve my problem.

I would like to know how to do the same thing that date +%U but for a specific date.

For example:
Code:
2011 08 27
=> 39

Thinks a lot
Last edited by Castelior; 11-30-2011 at 05:22 AM..
# 2  
Old 11-29-2011
Do you have GNU date?
Code:
# date -d"01 Aug 2011" +%U
31

# 3  
Old 11-29-2011
Quote:
Originally Posted by CarloM
Do you have GNU date?
Code:
# date -d"01 Aug 2011" +%U
31

No I don't... Can I install it? and how? I'm on AIX.

Thanks
# 4  
Old 11-29-2011
It's part of coreutils.

iirc, IBM offer a coreutils RPM for AIX.
# 5  
Old 11-29-2011
Yep, there you go:
IBM AIX Toolbox for Linux Applications - Easy Install
# 6  
Old 11-29-2011
Do you have Perl installed? Try this:
Code:
perl -e '@x=localtime; print int $x[7]/7 + 1'

But this will give you the week number for current time. Similar to "date +%U".
# 7  
Old 11-29-2011
Another one... Check if you have ncal...
Code:
ncal -w 8 2011 | awk '{for(i=2;i<=NF;i++){if($i==27){col=i;next}}}END{print $(col-1)}'

--ahamed
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