iso8601 - Man Page

Part of the Pacemaker cluster resource manager


iso8601 <command> [options]


Display and parse ISO 8601 dates and times


Help Options

-h,  --help

Show help options


Show all help options


Show command options


Show output modifiers


-n,  --now

Display the current date/time

-d,  --date=DATE

Parse an ISO 8601 date/time (for example, '2019-09-24 00:30:00 +01:00' or '2019-040')

-p,  --period=PERIOD

Parse an ISO 8601 period (interval) with start time (for example, '2005-040/2005-043')

-D,  --duration=DURATION

Parse an ISO 8601 duration (for example, 'P1M')

-E,  --expected=TEXT

Exit with error status if result does not match this text. Requires: -n or -d

Output modifiers

-s,  --seconds

Show result as a seconds since 0000-001 00:00:00Z

-S,  --epoch

Show result as a seconds since EPOCH (1970-001 00:00:00Z)

-L,  --local

Show result as a 'local' date/time

-O,  --ordinal

Show result as an 'ordinal' date/time

-W,  --week

Show result as an 'calendar week' date/time

Application Options

-$,  --version

Display software version and exit

-V,  --verbose

Increase debug output (may be specified multiple times)

For more information on the ISO 8601 standard, see


Written by Andrew Beekhof and the Pacemaker project contributors


January 2024 Pacemaker 2.1.7-4.fc40.2 System Administration Utilities