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@ter4uchi/easy-date

v0.1.1

Published

Format JavaScript Date values into easy-to-read Japanese date and time text.

Readme

easy-date

Date を受け取って、やさしい日本語の日時表現を返す小さな npm パッケージです。

厚生労働省の「わかりやすい情報提供のための手引き」を参考に、少なくとも次の方針を反映しています。

  • 漢数字ではなく算用数字を使う
  • 時刻は 24 時間表記ではなく、午後夕方 などで表す
  • 本日 のような硬い表現より、今日 のような日常語を優先する

参考資料: わかりやすい情報提供のための手引き(厚生労働省, PDF)

Install

npm install @ter4uchi/easy-date

Usage

import { formatEasyDateTimeJa } from "@ter4uchi/easy-date";

const referenceDate = new Date(2026, 2, 11, 9, 0);
const eventDate = new Date(2026, 2, 11, 16, 0);

console.log(formatEasyDateTimeJa(eventDate, { referenceDate }));
//=> 今日の夕方4時

API

formatEasyDateTimeJa(date, options?)

日時を 今日の夕方4時 のような形で返します。

formatEasyDateJa(date, options?)

日付部分だけを返します。

  • 今日
  • 明日
  • あさって
  • 3月15日
  • 2027年1月1日

formatEasyTimeJa(date)

時刻部分だけを返します。

  • 午前12時15分
  • 朝9時半
  • 午後2時
  • 夕方4時
  • 夜8時5分

Options

referenceDate?: Date

相対表現の基準日です。省略時は new Date() を使います。

入力された Date のローカル時刻をそのまま使います。

Development

npm test