bttf – datetime arithmetic, parsing, formatting and more

bttf (formerly known as biff) is a command-line utility for working with dates, times, durations, and time zones from the shell.

It lets you carry out datetime arithmetic, parse human-friendly temporal expressions, format timestamps in different representations, and handle common command-line time workflows such as calculating spans, generating recurring datetimes, and transforming timestamps in logs.

This is free and open source software.

Key Features

• Generates sequences of datetimes using RFC 5545 recurrence rules.
• Performs calendar and absolute duration arithmetic safely across daylight saving time boundaries.
• Uses the IANA time zone database for timezone-aware conversions.
• Tags arbitrary JSON lines data with datetimes, which is useful for reformatting or localizing log timestamps.
• Compares and sorts datetimes.

Website: github.com/BurntSushi/bttf
Support:
Developer: Andrew Gallant
License: MIT License or The Unlicense

bttf is written in Rust. Learn Rust with our recommended free books and free tutorials.

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