Comments on: Easy date calculations in Unix scripts with GNU date

By: DonF

DonF — Wed, 16 Feb 2011 22:04:25 +0000

oops, make that:
date -d '30 days ago 09/02/2008'
Sun Aug 3 00:00:00 PDT 2008

By: DonF

DonF — Wed, 16 Feb 2011 22:01:54 +0000

Late reply for Robert but:

date -d '30 days ago sep 02 2008'
Wed Aug 3 20:08:00 PDT 2011

By: Robert

Robert — Sat, 28 Nov 2009 03:24:08 +0000

how do I take a date like 2008/Sep/02 and subract 30 days from it without writing out some sort of awk function? Or is it even possible?

By: t.burninator

t.burninator — Sat, 15 Aug 2009 06:41:24 +0000

If your system isn't set up to display GMT by default (IE; your local time); I believe that you can use "date -u". date -u gives "print or set Coordinated Universal Time". Isn't that GMT? Regards

By: Gleb Reys

Gleb Reys — Sat, 09 May 2009 00:38:32 +0000

Hi Danielle,

I think it shows you the date according to your current timezone, so if you're in GMT, you'll get all the dates returned in GMT.

By: danielleb3ar

danielleb3ar — Fri, 08 May 2009 23:27:40 +0000

how do i get the GMT?

By: Confirm the Day of the Week Based on a Timestamp | UNIX Tutorial: Learn UNIX

Thu, 20 Nov 2008 15:51:52 +0000

[...] all you need is to have GNU date command at your disposal. I've already shown you all the basic date/time calculations using this great tool, and that's just another way of using [...]

By: eljunior

eljunior — Sat, 18 Oct 2008 00:52:12 +0000

yeah, GNU date is very powerful.
it's actually kind of fun writing loops like:

date='today'
for((i=0;i<7;i++))
do
echo $date
date=`date -d "$date +1 day" +%Y-%m-%d`
done