和暦と西暦の双方向変換をサポートするツール。全元号（新元号・令和））対応。

西暦を和暦に変換出力するツール。php5 以上なら動きます

jcalendaR is a package for converting between current Japanese calendar, old Japanese calendar that Kyureki, and Julian and (proleptic) Gregorian calendar in R.

R package for Handling Japanese Calender

✨A collection of tools to manipulate the Japanese and Western calendars for javascript and typescript.

A thin wrapper for Python's datetime package for simple Japanese calendar dates and time formats.

An app with widget can display japanese holidays, lunar date, wareki

日本の元号のデータセット / Dataset of the Japanese era

AI-native REST API + MCP server for Japanese calendar (rokuyo/暦注/kanshi/24 solar terms) with purpose-specific auspicious-day judgments. OpenAPI 3.1, GPTs Actions, Claude Tool Use, Gemini Function Calling ready. 日本の暦APIを天文学的精度で。