# hebcal を Homebrew, apt, Nix でインストール

hebcal 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:hebcal
```

追加のインストールコマンド:

### macOS

- Homebrew (100%):

```sh
brew install hebcal
```

  証拠: local Homebrew formula metadata

### Linux

- Debian apt (92%):

```sh
sudo apt install hebcal
```

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

- Nix (92%):

```sh
nix profile install nixpkgs#hebcal
```

  証拠: nixpkgs package indexes: pkgs/by-name/he/hebcal/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:hebcal
- **パッケージマネージャ:** Homebrew
- **バージョン:** 5.15.0
- **ソース概要:** Perpetual Jewish calendar for the command-line
- **ホームページ:** <https://hebcal.github.io/>
- **リポジトリ:** <https://github.com/hebcal/hebcal>
- **最終更新:** 2026-07-25T20:56:30-04:00
- **生成日時:** 2026-08-03T19:37:03+00:00

## 実行可能ファイル

- hebcal (エイリアス)

## インストール挙動

- Bottle: 利用不可

## バージョンと鮮度

- ページ生成日: 2026-08-03
- マネージャ版: 5.15.0
## プロジェクトの歴史と使われ方

hebcal is a command-line perpetual Jewish calendar. It prints Hebrew dates, holidays, weekly Torah portions, Omer counts, candle-lighting and Havdalah times, daily learning schedules, and related calendar data for scripted or terminal use.

### プロジェクトの歴史

The README credits Danny Sadinoff as the original author, with portions by Michael J. Radwin and later contributions for JavaScript, Daf Yomi, Molad, and sunrise/sunset features. It describes Hebcal as a flexible program for printing Jewish calendar events for a given secular or Hebrew year, month, day, or ISO date.

The README records that version 3 rewrote much of the program using the Emacs 19 calendar routines by Edward M. Reingold and Nachum Dershowitz, tying the Unix CLI to a wider lineage of calendrical computation rather than a single-purpose holiday table. GitHub repository metadata records the public hosted project from July 2013.

### 採用の歴史

Hebcal occupies the classic Unix utility niche: a domain-specific calendar program that can print plain text, tab-delimited output, localized event names, and date ranges for shell scripts or human reading. The input package facts record packaging in Homebrew, Debian, Ubuntu, and Nix, suggesting sustained use by command-line users who want Jewish calendar data outside a web app.

### 使われ方

The CLI accepts a year, month/day/year, Hebrew month/year, or ISO date and can selectively enable or suppress Hebrew dates, holidays, sedrot, Omer counts, modern Israeli holidays, candle-lighting, Havdalah, zmanim, and daily learning schedules. Its environment support includes `HEBCAL_CITY` for default candle-lighting geography and `HEBCAL_OPTS` for repeated command options.

### パッケージ好きにとっての重要性

For package nerds, Hebcal is a good example of a small culturally specific Unix tool that remains valuable because it is composable. It turns calendrical rules, local sunset calculations, transliteration choices, and recurring study cycles into predictable command output that can be piped, scripted, cron-run, or wrapped by other calendar systems.

### タイムライン

- Version 3 era: The README says much of Hebcal was rewritten using Emacs 19 calendar routines by Reingold and Dershowitz.
- 2013: GitHub repository metadata records the hosted Hebcal source repository.
- Package-manager era: The input package facts record Hebcal in Homebrew, Debian, Ubuntu, and Nix packaging.

### Related projects

- The README explicitly points to `calendar(1)`, Emacs calendar, hcal, hdate, omer, remind, and rise as related command-line or calendar tools. Algorithmically it is related to the calendrical work of Edward M. Reingold and Nachum Dershowitz.

### ソース

- <https://github.com/hebcal/hebcal>
- <https://hebcal.github.io/>
- <https://raw.githubusercontent.com/hebcal/hebcal/main/README.md>


## 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

## 他のパッケージマネージャ記録

- Debian apt - hebcal - 4.31-1: normalized package name match | Debian stable package indexes: hebcal from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Perpetual Jewish Calendar | https://github.com/hebcal/hebcal
- Nix - hebcal: normalized package name match | nixpkgs package indexes: pkgs/by-name/he/hebcal/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
- Ubuntu apt - hebcal - 4.31-1: normalized package name match | Ubuntu 24.04 LTS package indexes: hebcal from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Perpetual Jewish Calendar | https://github.com/hebcal/hebcal


## Combined YAML source

View the package source record on GitHub. [combined/hebcal.yml](https://github.com/mxcl/pkgdb/blob/main/combined/hebcal.yml)


## ソース

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