Date - how to get (year -1) (221 Views)
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Regular Advisor
Fenglin
Posts: 152
Registered: ‎05-13-2008
Message 1 of 8 (221 Views)

Date - how to get (year -1)

Hi

how to get year-1?

YRLESS=`date +%Y-1`
echo $YRLESS
The above does not work.

Regards
Feng Lin
Acclaimed Contributor
Dennis Handly
Posts: 25,277
Registered: ‎03-06-2006
Message 2 of 8 (221 Views)

Re: Date - how to get (year -1)

You would have to write a program. Or in perl subtract a year from now. But you would have to handle leap years, either Feb 29 doesn't exist or you would have to include an extra day, if you want the month and day to match the current year.
Acclaimed Contributor
Dennis Handly
Posts: 25,277
Registered: ‎03-06-2006
Message 3 of 8 (221 Views)

Re: Date - how to get (year -1)

Ah, if you just want to get last year and not a date:
$ YRLESS=$(( $(date +%Y) - 1 ))
Or:
$ (( YRLESS = $(date +%Y) - 1 ))
Honored Contributor
Suraj K Sankari
Posts: 1,659
Registered: ‎09-09-2008
Message 4 of 8 (221 Views)

Re: Date - how to get (year -1)

Hi,
You can do this way, cy=current year, py=previous year

$ cy=date +%Y
$ py=`expr $cy - 1 `
$ echo $py
2009


Suraj
Honored Contributor
H.Merijn Brand (procura
Posts: 6,189
Registered: ‎10-13-1997
Message 5 of 8 (221 Views)

Re: Date - how to get (year -1)

$ date '+%Y-1'|bc
2009

Enjoy, Have FUN! H.Merijn [ could not resist to do it even shorter ]
Enjoy, Have FUN! H.Merijn
Trusted Contributor
Tor-Arne Nostdal
Posts: 268
Registered: ‎08-17-1998
Message 6 of 8 (221 Views)

Re: Date - how to get (year -1)

let YRLESS=`date +%Y`-1
echo $YRLESS

/Tor-Arne
I'm trying to become President of the state I'm in...
Regular Advisor
Fenglin
Posts: 152
Registered: ‎05-13-2008
Message 7 of 8 (221 Views)

Re: Date - how to get (year -1)

Thanks to all.

Regards
Feng Lin
Acclaimed Contributor
Dennis Handly
Posts: 25,277
Registered: ‎03-06-2006
Message 8 of 8 (221 Views)

Re: Date - how to get (year -1)

>Thanks to all.

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