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Top Forums Shell Programming and Scripting Add or Subtract the hours,minutes or seconds in the the time variable Post 302891885 by anuragpgtgerman on Sunday 9th of March 2014 03:58:10 AM
Old 03-09-2014
Add or Subtract the hours,minutes or seconds in the the time variable

Hello All,

I am working on script where I need to add hours,minutes or seconds in the time.Time is not the current but it could be future time.I thought I can store that time in variable and add hours.minutes or second but I am not able to add that in the time that is stores in a variable.
Time is in specific format
Code:
Start_Time="May 12, 2012 10:00:00 AM MST"

I have another way which I Incorporated in my script which changes the time into GMT.But the problem is this method cause an issue when daylight saving system starts.MDT is fine during these days but if someone choose MST time zone it creates an issue.I am working on Linux system(x86_64) and bash shell
Code:
date "+%B %e, %Y %X" -u -d 'May 12, 2012 10:00:00 AM MDT'
output :->May 12, 2012 04:00:00 PM

date "+%B %e, %Y %X" -u -d 'May 12, 2012 10:00:00 AM MST'
output:->May 12, 2012 05:00:00 PM

 

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Time::Seconds(3pm)					 Perl Programmers Reference Guide					Time::Seconds(3pm)

NAME
Time::Seconds - a simple API to convert seconds to other date values SYNOPSIS
use Time::Piece; use Time::Seconds; my $t = localtime; $t += ONE_DAY; my $t2 = localtime; my $s = $t - $t2; print "Difference is: ", $s->days, " "; DESCRIPTION
This module is part of the Time::Piece distribution. It allows the user to find out the number of minutes, hours, days, weeks or years in a given number of seconds. It is returned by Time::Piece when you delta two Time::Piece objects. Time::Seconds also exports the following constants: ONE_DAY ONE_WEEK ONE_HOUR ONE_MINUTE ONE_MONTH ONE_YEAR ONE_FINANCIAL_MONTH LEAP_YEAR NON_LEAP_YEAR Since perl does not (yet?) support constant objects, these constants are in seconds only, so you cannot, for example, do this: "print ONE_WEEK->minutes;" METHODS
The following methods are available: my $val = Time::Seconds->new(SECONDS) $val->seconds; $val->minutes; $val->hours; $val->days; $val->weeks; $val->months; $val->financial_months; # 30 days $val->years; $val->pretty; # gives English representation of the delta The usual arithmetic (+,-,+=,-=) is also available on the objects. The methods make the assumption that there are 24 hours in a day, 7 days in a week, 365.24225 days in a year and 12 months in a year. (from The Calendar FAQ at http://www.tondering.dk/claus/calendar.html) AUTHOR
Matt Sergeant, matt@sergeant.org Tobias Brox, tobiasb@tobiasb.funcom.com BalieXXzs SzabieXX (dLux), dlux@kapu.hu LICENSE
Please see Time::Piece for the license. Bugs Currently the methods aren't as efficient as they could be, for reasons of clarity. This is probably a bad idea. perl v5.16.2 2012-10-11 Time::Seconds(3pm)
All times are GMT -4. The time now is 01:36 PM.
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