Bttf is a command-line datetime Swiss Army knife | Hacker News

Bttf, a command-line datetime tool, was demonstrated on Hacker News for working with file timestamps from git history.

The examples showed listing repository files, converting commit times to local time, sorting them, filtering by date range, and formatting output.

Commenters discussed shell syntax, performance on large repositories, and comparisons with other datetime tools and standards.

The demo highlights how Bttf could replace custom shell scripts and manual date handling for file-history workflows.