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Print a date from 3 days ago

Terminal - Print a date from 3 days ago
TZ=PST8PDT+72 date '+%Y_%m_%d'
2010-07-02 00:29:27
Functions: date
4
Print a date from 3 days ago

This command prints the Date (Not time) from 3 days ago (72 hours ago).

This works on systems without GNU date (MacOSX , Solaris, FreeBSD).

Alternatives

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Terminal - Alternatives

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What others think

why my console display 2010_07_01 in MacOSX10.6.4 OS?

Comment by fire9 265 weeks and 5 days ago

@fire9 : I'm not sure. It works for me on 10.5.8.

Try '+24' instead of '+72'

Comment by StefanLasiewski 265 weeks and 5 days ago

You can also use:

date -d "-3 days" +%Y_%m_%d

but I dont know if that will work on non gnu systems..

Comment by xeor 265 weeks and 5 days ago

No, that will not work on non-GNU systems and that is exactly why this recipe is so good, so your attempt to help was kind of off the target. Everybody knows the date calculation capacities of GNU date (which don't apply to the regular UNIX date command) and the difficulties of working with dates on AIX/HP-UX/Solaris without perl.

Comment by Patola 265 weeks and 3 days ago

@xeor : On non-GNU systems (MacOSX, *BSD, etc). The '-d' flag "SETS the kernel's value for daylight saving time." It *sets* the time.

Comment by StefanLasiewski 265 weeks ago

It worked for by changing PST8PDT to GMT, so the new command:

TZ=GMT+72 date '+%Y_%m_%d'
Comment by ali980 195 weeks and 6 days ago

Your point of view

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