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37 lines
1.2 KiB
Markdown
37 lines
1.2 KiB
Markdown
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# biff
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> A simple utility for doing datetime arithmetic, parsing and formatting.
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> More information: <https://github.com/burntsushi/biff>.
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- Print the current time in a format of your choosing:
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`biff time fmt {{[-f|--format]}} rfc3339 now`
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- Print multiple relative times in one command:
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`biff time fmt {{[-f|--format]}} '%c' now -1d 'next sat' 'last monday' '9pm last mon'`
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- Print the current time in another time zone, and round it the nearest 15 minute increment:
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`biff time in Asia/Bangkok now | biff time round {{[-i|--increment]}} 15 {{[-s|--smallest]}} minute`
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- Convert a time between two different time zone:
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`TZ='Japan' biff time in America/New_York 02:30`
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- Print a past or future time relative to current time:
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`biff time add {{-1d|1d|1w|-1m|1y|...}} now`
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- Add a complex duration to the current time:
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`biff time add '1 week, 12 hours ago' now`
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- Find the duration since a date in the past and round it to the desired precision:
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`biff span since 2025-01-20T12:00 {{[-l|--largest]}} year`
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- Find timestamps in a log file and reformat them into your local time in place:
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`biff tag lines /tmp/access.log | biff time in system | biff time fmt {{[-f|--format]}} '%c' | head {{[-n|--lines]}} 3 | biff untag {{[-s|--substitute]}}`
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