92 lines
3.4 KiB
Plaintext
92 lines
3.4 KiB
Plaintext
utc: convert times to UTC
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Usage: utc [-f format] [-h] [-o format] [-q] [-u] [-z zone] [time(s)...]
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utc converts times to UTC. If no arguments are provided, prints the
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current time in UTC. If the only time provided is "-", reads newline-
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separated timestamps from standard input. If both the input and output
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timezones are the same (e.g., the local time zone is UTC), a warning
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message will be printed on standard error. This can be suppressed with
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the -q option.
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Flags:
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-f format Go timestamp format for input times. See the Go docs
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(e.g. https://golang.org/pkg/time/#pkg-constants)
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for an explanation of this format.
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Default value: 2006-01-02 15:04
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-h Print this help message.
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-o format Go timestamp format for outputting times. Uses the
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same format as the '-f' argument; it defaults to
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the same value as the '-f' argument.
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-q Suppress the timezone check warning message.
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-u Timestamps are in UTC format and should be converted
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to the timezone specified by the -z argument (which
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defaults to 'Local'). Note that this isn't particularly
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useful with no arguments.
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-z zone Text form of the time zone; this can be in short
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time zone abbreviation (e.g. MST) or a location
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(e.g. America/Los_Angeles). This has no effect when
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printing the current time.
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Default value: Local
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Examples (note that the examples are done in the America/Los_Angeles /
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PST8PDT time zone):
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+ Getting the current time in UTC:
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$ utc
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2016-06-14 14:30 = 2016-06-14 21:30
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+ Converting a local timestamp to UTC:
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$ utc '2016-06-14 21:30'
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2016-06-14 21:30 = 2016-06-15 04:30
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+ Converting a local EST timestamp to UTC (on a machine set to
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PST8PDT):
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$ utc -z EST '2016-06-14 21:30'
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2016-06-14 21:30 = 2016-06-15 02:30
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+ Converting timestamps in the form '14-06-2016 3:04PM':
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$ utc -f '02-01-2006 3:04PM' '14-06-2016 9:30PM'
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14-06-2016 9:30PM = 15-06-2016 4:30AM
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+ Converting timestamps from standard input:
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$ printf "2016-06-14 14:42\n2016-06-13 11:01" | utc -
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2016-06-14 14:42 = 2016-06-14 21:42
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2016-06-13 11:01 = 2016-06-13 18:01
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+ Converting a UTC timestamp to the local time zone:
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$ utc -u '2016-06-14 21:30'
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2016-06-14 21:30 = 2016-06-14 14:30
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+ Converting a UTC timestamp to EST (on a machine set to
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PST8PDT):
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$ utc -u -z EST '2016-06-14 21:30'
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2016-06-14 21:30 = 2016-06-14 16:30
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+ Using a different output format:
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$ utc -o '2006-01-02T15:03:04MST' '2016-06-14 21:30'
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2016-06-14 21:30 = 2016-06-15T04:04:30UTC
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+ Example of the warning message when running utc on a machine
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where the local time zone is UTC:
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$ utc
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==================================================================
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Note: both input and output timezone offsets are the same --- this
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program may not do what you expect it to.
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(Converting from UTC (offset +0000) to UTC (offset +0000).)
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==================================================================
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2016-06-14 23:44 = 2016-06-14 23:44
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+ Example of the warning message when running utc on a machine
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where the local time zone is GMT:
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$ utc
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==================================================================
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Note: both input and output timezone offsets are the same --- this
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program may not do what you expect it to.
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(Converting from GMT (offset +0000) to UTC (offset +0000).)
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==================================================================
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2016-06-14 23:46 = 2016-06-14 23:46
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