About

Date/time CLI utility

See also the kron-lib crate.

Usage

$ kron -h
Date/time CLI utility

Usage: kron [OPTIONS] [ARG]...

Arguments:
  [ARG]...  Argument ["%s[%.f]" timestamp, default: now]

Options:
  -f, --format <FORMAT>  Format (COMPACT, ISO8601, ISO8601NS) [default: ISO8601]
  -r, --readme           Print readme
  -h, --help             Print help
  -V, --version          Print version

$ kron -V
kron 2.1.0

Examples

Now

$ kron
2023-05-29T14:43:19Z

Alternate formats

$ kron -f COMPACT
20230529-144319Z

$ kron -f ISO8601NS
2023-05-29T14:43:19.240644157Z

Custom formats

$ kron -f '[hour]:[minute]'
14:43

$ kron -f '[weekday repr:long], [month repr:long] [day], [year]'
Monday, May 29, 2023

Single timestamp

$ kron 0
1970-01-01T00:00:00Z

Multiple timestamps

$ kron 0 3600 7200
1970-01-01T00:00:00Z
1970-01-01T01:00:00Z
1970-01-01T02:00:00Z

Subsecond timestamp

$ kron -f ISO8601NS 626609862.1234
1989-11-09T10:17:42.123400000Z

Invalid timestamp

$ kron not-a-timestamp
Error: Invalid timestamp: "not-a-timestamp"

Format syntax

Component	Description
`[day {padding:{zero,space,none}}]`	Day of month
`[hour {padding:{zero,space,none},repr:{12,24}}]`	Clock hour
`[minute {padding:{zero,space,none}}]`	Minute within the clock hour
`[month {padding:{zero,space,none},repr:{numerical,long,short},case_sensitive:{true,false}}]`	Month
`[offset_hour {padding:{zero,space,none},sign:{automatic,mandatory}}]`	Whole hours offset from UTC
`[offset_minute {padding:{zero,space,none}]`	Minutes within the hour offset from UTC
`[offset_second {padding:{zero,space,none}]`	Seconds within the minute offset from UTC
`[ordinal {padding:{zero,space,none}}]`	Day of year
`[period {case:{lower,upper},case_sensitive:{true,false}}]`	AM/PM
`[second {padding:{zero,space,none}}]`	Second within the clock minute
`[subsecond {digits:1+,1,2,3,4,5,6,7,8,9}]`	Subsecond within the clock second
`[unix_timestamp {precision:{second,millisecond,microsecond,nanosecond},sign:{automatic,mandatory}}]`	Unix timestamp
`[week_number {padding:{zero,space,none},repr:{iso,sunday,monday}}]`	Week of the year
`[weekday {repr:{long,short,sunday,monday},one_indexed:{false,true},case_sensitive:{true,false}}]`	Day of the week
`[year {padding:{zero,space,none},repr:{full,last_two},base:{calendar,iso_week},sign:{automatic,mandatory}}]`	Year

See https://time-rs.github.io/book/api/format-description.html for additional details.