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Get the date for the last Saturday of a given month

Terminal - Get the date for the last Saturday of a given month
cal 04 2012 | awk 'NF <= 7 { print $7 }' | grep -v "^$" | tail -1
2012-05-03 16:57:45
User: javidjamae
Functions: awk cal grep tail
-2
Up
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Get the date for the last Saturday of a given month

This is a little trickier than finding the last Sunday, because you know the last Sunday is in the first position of the last line. The trick is to use the NF less than or equal to 7 so it picks up all the lines then grep out any empty lines.

Show sample output | Add to favourites | Report as malicious

Alternatives

There is 1 alternative - vote for the best!

Terminal - Alternatives
cal 04 2012 | awk '{ $7 && X=$7 } END { print X }'
2012-05-06 23:43:21
User: flatcap
Functions: awk cal
Tags: Date manipulation awk date cal
2
Up
Down
Get the date for the last Saturday of a given month

If your locale has Monday as the first day of the week, like mine in the UK, change the two $7 into $6

Show sample output | Comments (1) | Add to favourites | Report as malicious
desiredDay=6; year=2012; month=5; n=0; while [ $(date -d "$year-$((month+1))-1 - $n day" "+%u") -ne $desiredDay ]; do n=$((n+1)); done; date -d "$year-$((month+1))-1 - $n day" "+%x"
2012-05-17 12:02:30
User: ClashTheBunny
Functions: date
Tags: Date manipulation bash date
0
Up
Down
Get the date for the last Saturday of a given month

Choosing your year and month. You only need the gnu date command and bash. desiredDay of the week is (1..7); 1 is Monday.

If you want desiredDay of week (0..6); 0 is Sunday

desiredDay=6; year=2012; month=5; n=0; while [ $(date -d "$year-$((month+1))-1 - $n day" "+%w") -ne $desiredDay ]; do n=$((n+1)); done; date -d "$year-$((month+1))-1 - $n day" "+%x"
Show sample output | Comments (0) | Add to favourites | Report as malicious

Know a better way?

If you can do better, submit your command here.

What others think

Uh, not sure. It's May here and I get last day of the current month.

31 using

cal 04 2012 | awk '{ $7 && X=$7 } END { print X }

Comment by Habitual 54 weeks and 3 days ago

@habitual: that's what the '04' parameter is: April. Replace it with 05 for May.

Comment by flatcap 54 weeks and 3 days ago

flatcap: But what if I WANT the last day of 04?

Comment by Habitual 54 weeks and 2 days ago

I think cal now supports knowing the first day of the week depending on your _NL_TIME_WEEK_1STDAY. Does your output of `cal 05 2012` equal:

May 2012

Su Mo Tu We Th Fr Sa

1 2 3 4 5

6 7 8 9 10 11 12

13 14 15 16 17 18 19

20 21 22 23 24 25 26

27 28 29 30 31

Comment by ClashTheBunny 53 weeks ago

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