# ddate を Homebrew, apk, apt, dnf, Nix でインストール

ddate のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。

## インストール

```sh
sudo av install brew:ddate
```

追加のインストールコマンド:

### macOS

- Homebrew (100%):

```sh
brew install ddate
```

  証拠: local Homebrew formula metadata

### Linux

- apk (92%):

```sh
sudo apk add ddate
```

  証拠: Alpine Linux edge package indexes: ddate from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz

- Debian apt (92%):

```sh
sudo apt install ddate
```

  証拠: Debian stable package indexes: ddate from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz

- dnf (92%):

```sh
sudo dnf install ddate
```

  証拠: Fedora Rawhide package metadata: ddate from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst

- Nix (92%):

```sh
nix profile install nixpkgs#ddate
```

  証拠: nixpkgs package indexes: pkgs/by-name/dd/ddate/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

## パッケージ情報

- **パッケージキー:** brew:ddate
- **パッケージマネージャ:** Homebrew
- **パッケージマネージャページ:** <https://formulae.brew.sh/formula/ddate>
- **バージョン:** 0.2.2
- **ソース概要:** Converts boring normal dates to fun Discordian Date
- **ホームページ:** <https://github.com/bo0ts/ddate>
- **リポジトリ:** <https://github.com/bo0ts/ddate>
- **上流ドキュメント:** <https://github.com/bo0ts/ddate#readme>
- **ライセンス:** LicenseRef-Homebrew-public-domain
- **ソースアーカイブ:** <https://github.com/bo0ts/ddate/archive/refs/tags/v0.2.2.tar.gz>
- **生成日時:** 2026-07-08T07:18:31+00:00

## 実行可能ファイル

- ddate (cli)
- ddate (エイリアス)

## インストール挙動

- post-install フック: 未定義
- Bottle: 利用可能 対象 arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura

## バージョンと鮮度

- ページ生成日: 2026-07-08
- マネージャ版: 0.2.2
- ローカルデータ: OK
- 上流リポジトリ: https://github.com/bo0ts/ddate
- 検出された最新: v0.2.2 (最新)
- 情報: No package-manager update timestamp was available.
## プロジェクトの歴史と使われ方

ddate converts Gregorian dates to the Discordian, or POEE, calendar. The standalone repository describes itself as the same ddate version from util-linux 2.20, kept separate because util-linux no longer builds ddate by default.

### プロジェクトの歴史

The bo0ts/ddate repository was created in 2011 after ddate's status in util-linux changed. Its README preserves the compact converter and includes the calendar's seasons, weekdays, holidays, and Saint Tib's Day rules.

### 採用の歴史

ddate survives as a small Unix culture package: not operationally critical, but still present in Homebrew, Linux distributions, and Nix for users who want the classic command without depending on util-linux to ship it.

### 使われ方

Users run ddate as a date-conversion CLI. The bundled manpage and README document the Discordian calendar rather than application configuration, so it has no persistent config or credential file.

### パッケージ好きにとっての重要性

Package nerds care about ddate because it is a tiny artifact of Unix humor and distribution policy. Its continued packaging shows how small commands can outlive their original host project when users still value the behavior.

### タイムライン

- 2011: Standalone GitHub repository created
- 2011: README says the code matches util-linux 2.20
- 2011: Project preserved because util-linux stopped building ddate by default

### Related projects

- util-linux, Arch User Repository

### ソース

- <https://github.com/bo0ts/ddate>
- <https://github.com/bo0ts/ddate#readme>
- <https://github.com/bo0ts/ddate/blob/master/ddate.1>
- <https://api.github.com/repos/bo0ts/ddate>


## セキュリティノート

narrow executable package without higher-risk signals.

- **Geiger リスク:** グリーン / 低
- narrow executable package without higher-risk signals

## ソースデータベース詳細

- **Source Database:** Homebrew formula API
- **Tap:** homebrew/core
- **Full Name:** ddate
- **Version Scheme:** 0
- **Revision:** 0
- **Bottle Stable Root URL:** <https://ghcr.io/v2/homebrew/core>
- **Deprecated:** no
- **Disabled:** no
- **Keg Only:** no
- **URL Keys:** stable

## 他のパッケージマネージャ記録

- Debian apt - ddate - 0.2.2-1.1: normalized package name match | Debian stable package indexes: ddate from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | convert Gregorian dates to Discordian dates | https://github.com/bo0ts/ddate
- Nix - ddate: normalized package name match | nixpkgs package indexes: pkgs/by-name/dd/ddate/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
- Ubuntu apt - ddate - 0.2.2-1build1: normalized package name match | Ubuntu 24.04 LTS package indexes: ddate from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | convert Gregorian dates to Discordian dates | https://github.com/bo0ts/ddate
- apk - ddate - 0.2.2-r6: normalized package name match | Alpine Linux edge package indexes: ddate from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Convert Gregorian dates to Discordian dates | https://github.com/bo0ts/ddate
- apk - ddate-doc - 0.2.2-r6: normalized package name match | Alpine Linux edge package indexes: ddate-doc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Convert Gregorian dates to Discordian dates (documentation) | https://github.com/bo0ts/ddate
- dnf - ddate - 0.2.2-25.fc44: normalized package name match | Fedora Rawhide package metadata: ddate from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst | Convert Gregorian dates to Discordian dates | https://github.com/bo0ts/ddate


## 関連リンク

- [Source-control packages](https://www.automicvault.com/ja/pkg/source-control-tools/) - Belongs to a source-control command family.
- [Terminal utility packages](https://www.automicvault.com/ja/pkg/terminal-utilities/) - Matched terminal and command-line workflow metadata.
- [Networking and protocol packages](https://www.automicvault.com/ja/pkg/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata.
- [Productivity CLI packages](https://www.automicvault.com/ja/pkg/productivity-cli-packages/) - Matched curated productivity category metadata from av.db.
- [jcal](https://www.automicvault.com/ja/pkg/brew/jcal/) - Shares av.db curated category or tags: calendar, cli, date-conversion, productivity.
- [calcurse](https://www.automicvault.com/ja/pkg/brew/calcurse/) - Shares av.db curated category or tags: calendar, cli, productivity.
- [ccal](https://www.automicvault.com/ja/pkg/brew/ccal/) - Shares av.db curated category or tags: calendar, cli, productivity.
- [gcalcli](https://www.automicvault.com/ja/pkg/brew/gcalcli/) - Shares av.db curated category or tags: calendar, cli, productivity.
- [hebcal](https://www.automicvault.com/ja/pkg/brew/hebcal/) - Shares av.db curated category or tags: calendar, cli, productivity.
- [ical-buddy](https://www.automicvault.com/ja/pkg/brew/ical-buddy/) - Shares av.db curated category or tags: calendar, cli, productivity.
- [khal](https://www.automicvault.com/ja/pkg/brew/khal/) - Shares av.db curated category or tags: calendar, cli, productivity.
- [pcal](https://www.automicvault.com/ja/pkg/brew/pcal/) - Shares av.db curated category or tags: calendar, cli, productivity.
- [omekasy](https://www.automicvault.com/ja/pkg/brew/omekasy/) - Local package facts share a topical domain. Shared terms: cli, conversion, converts, productivity.
- [vdirsyncer](https://www.automicvault.com/ja/pkg/brew/vdirsyncer/) - Local package facts share a topical domain. Shared terms: calendar, cli, productivity.

## Combined YAML source

View the package source record on GitHub. [combined/ddate.yml](https://github.com/automic-vault/db/blob/main/combined/ddate.yml)


## ソース

- Nucleus package database
- Geiger risk classifier
- package-page enrichment
- curated package history
- package version freshness
- av.db category and tag curation
- package relationship graph
- external package-manager database matches
- cross-ecosystem install command graph