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Install bttf with Homebrew, Nix, scoop

CLI tool for datetime arithmetic, parsing, formatting and more. Version 0.1.4 via Homebrew; verified 2026-06-11. Also installable with nix: nix profile install nixpkgs#bttf.

Install commandSecurity notes

install

Additional install commands

macOS

Homebrewverified · 100%
brew install bttf

local Homebrew formula metadata

Linux

Nixverified · 92%
nix profile install nixpkgs#bttf

nixpkgs package indexes · pkgs/by-name/bt/bttf/package.nix · source: api.github.com

Windows

Scoopverified · 92%
scoop install main/bttf

Scoop official bucket manifest trees · bucket/bttf.json · source: api.github.com

overview

Package summary

CLI tool for datetime arithmetic, parsing, formatting and more

Commands and aliases

  • bttf

history

Project history and usage

bttf is a Rust command-line tool by BurntSushi for datetime parsing, formatting, arithmetic, time zones, durations, sequences, and pipeline-friendly transformations. It is young, but it sits in a familiar package niche: small CLIs that make date/time work scriptable.

Project history

The first public release was published in May 2025 under the name Biff. The project README notes that it was later renamed to bttf, and the 0.1.4 release describes itself as the first release after that rename.

The project is built around a structured command model: bttf time, bttf span, and bttf tz subcommands cover actions such as formatting, arithmetic, rounding, sequencing, sorting, and time-zone lookup.

Adoption history

Adoption is early and package-manager-oriented. The input metadata lists Homebrew and Nix packaging, while the upstream README also publishes precompiled archives and a crates.io package.

Its likely adopters are shell users, Rust users, log wranglers, and developers who need a more careful date/time CLI than basic date(1) pipelines.

How it is used

bttf can print the current time, parse RFC 2822/RFC 3339/RFC 9557/ISO 8601 and relative datetimes, add or subtract spans, round durations, generate date sequences, convert time zones, and tag pipeline input so transformed timestamps can be joined back to original lines.

The README documents BTTF_LOCALE as an environment variable affecting locale support, but no persistent config or credentials file is documented.

Why package nerds care

bttf is interesting less for age than for taste: it brings modern Rust datetime handling, rich timezone semantics, locale-aware formatting, static binary releases, Homebrew, Nix, and crates.io distribution to the humble date CLI problem.

For package maintainers, the rename from Biff to bttf is a useful bit of provenance because early release artifacts and history may still mention the old name.

Timeline

  • 2025: Initial 0.1.0 release published as Biff.
  • 2026: Project renamed from Biff to bttf.
  • 2026: bttf 0.1.4 published as the first release after the rename.

Related projects

  • Jiff is the Rust datetime ecosystem context associated with BurntSushi's date/time work.
  • date(1) and GNU coreutils date are the traditional Unix tools bttf complements.
  • crates.io distributes the Rust package, while Homebrew and Nix package the CLI for system users.

security posture

No protected-tool coverage found yet

No matching local secret-handling manifest was found for bttf. Nucleus package metadata is still published here so future coverage has a stable package URL.

Install behavior

  • No Homebrew bottle metadata was recorded.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

CommandKindExposureNote
bttfexecutableindexed executableDiscovered from the local executable index.

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-08-03
manager version0.1.4
manager updated2026-06-11
local dataunknown
upstreamnot available
latest detectednot detected
  • okNo freshness warnings were generated.

install metadata

Package metadata

Package keybrew:bttf
Version0.1.4
Package managerHomebrew
Homepagehttps://github.com/BurntSushi/bttf
Repositoryhttps://github.com/BurntSushi/bttf
Last updated2026-06-11T15:52:32Z
Pulseupdated
Bottlenot recorded
Servicenone declared

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Nix95%

bttf

nix profile install nixpkgs#bttf
  • normalized package name match
  • Matched by: Bttf
nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/bt/bttf/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
Scoop95%

main/bttf

scoop install main/bttf
  • normalized package name match
  • Matched by: Bttf
Scoop official bucket manifest trees · api.github.com · Scoop official bucket manifest trees: bucket/bttf.json from https://api.github.com/repos/ScoopInstaller/Main/git/trees/master?recursive=1

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Used sources

  • cross-ecosystem install command graph
  • curated package history
  • external package-manager database matches
  • pkg.so package database
  • pkgdb category and tag curation