new utility: timetrans.pl

I've posted a new utility, timetrans.pl, to the Tools page.  The following are both the "help" and "sample usage output" for timetrans.pl:

somehost [0] timetrans.pl -h

timetrans.pl translates between UNIX epoch time and normal date/time
    formats, optionally accepting either as input as well as the use of
    modifiers to further adjust the resulting time.

Usage:  timetrans.pl [-h|H]
        timetrans.pl [-v]
        timetrans.pl [-d|-e] [-l|-u] [-s] [-t (+|-)time]
                     [SECONDS|[yyyy/mm/dd@HH:MM:SS|yyyy/mm/dd HH:MM:SS]]

    -h              This help output.
    -H              Sample usage examples.
    -v              Display timetrans.pl version and exit
    -d              Force output to only normal data/time format; mutually
                    exclusive of -e; if set, -s is ignored (optional)
    -e              Force output to only epoch time format; mutually exclusive
                    to -d; if set, -s is ignored (optional)
    -l              Output time in localtime; mutually exclusive to -u
                    (default)
    -u              Output time in UTC; mutually exclusive to -l (optional)
    -s              Short output; returns only the translated value; ignored
                    if either -e or -d are set; if TIME value is not set,
                    short output defaults to date/time format (optional)
    -t              Modify time by (+|-) time; accepts values of seconds
                    or increment multipliers of (s|m|h|d|w) wherein
                    +3w2d1h5m20s would add a multiplier of 3 weeks, 2
                    days 1 hour, 5 minutes, and 20 seconds to the time
                    value; if no multiplier, the value is considered to
                    be seconds; if no (+|-), the value is added (optional)

    TIME            Input time value of SECONDS from 1970/01/01 00:00:00
                    UTC (UNIX epoch) or as a normalized local date/time
                    formatted either as 'yyyy/mm/dd@HH:MM:SS' or
                    'yyyy/mm/dd HH:MM:SS'; if not specified, current
                    time is used; can be a negative value, however it
                    must be preceded by flag '--'; TIME input can also
                    be piped to timetrans.pl (optional)

somehost [10] timetrans.pl -H

timetrans.pl sample usage examples.  For option descriptions, please see:
        'timetrans.pl -h'

EXAMPLES:

    Display version:
        somehost [0] timetrans.pl -v
        timetrans.pl version:  v0.1.1

    No parameters or time input:
        somehost [0] timetrans.pl
        2012/03/29 00:38:12 -0400
        UNIX time: 1332995892

    Using a negative time modifier with epoch time:
        somehost [0] timetrans.pl -t-1d37m 1280550076
        2010/07/29 23:44:16 -0400
        UNIX time: 1280461456

    Using normalized local date/time input:
        somehost [0] timetrans.pl 2010/07/31 00:21:16
        2010/07/31 00:21:16 -0400
        UNIX time: 1280550076

    Using normalized local date/time piped input:
        somehost [0] echo "2010/07/31:21:16" | timetrans.pl
        2010/07/31 00:21:16 -0400
        UNIX time: 1280550076

    Using piped data/time input and requesting short output:
        somehost [0] echo "2010/07/31 00:21:16" | timetrans.pl -s
        1280550076

    Using epoch time input and requesting short output:
        somehost [0] timetrans.pl -s 1280550076
        2010/07/31 00:21:16 -0400

    Using piped epoch time input with a time modifier and epoch time output:
        somehost [0] echo "1280550076" | timetrans.pl -t +2w3d4m5 -e
        1282019121

    Using a time modifier with local date/time input:
        somehost [0] timetrans.pl -t86400 2010/08/18 00:25:21
        2010/08/19 00:25:21 -0400
        UNIX time: 1282191921

    Using a negative time modifier with time/date input and time/date output:
        somehost [0] timetrans.pl -d -t -86400 2010/08/18 00:25:21
        2010/08/17 00:25:21 -0400

    Using a time modifier with local time/date input and UTC time/date output:
        somehost [0] timetrans.pl -d -u -t86400 2010/08/18 00:25:21
        2010/08/19 00:25:21 UTC

    Using a negative epoch time input:
        somehost [0] timetrans.pl -- -1282191921
        1929/05/15 15:34:39 -0400
        UNIX time: -1282191921

somehost [9]