wareki

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。

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

西暦を和暦に変換出力するツール。php5 以上なら動きます

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

R package for Handling Japanese Calender

Zero-dependency TypeScript library for Japanese holidays, business days, and wareki (era) date conversion

Code examples (curl / TypeScript / Python / MCP) for Torify — 36 Japanese locale APIs for AI agents. Wareki dates, invoice T-numbers, 法人番号, postal, name romanization. $0.02/call via x402.

MCP server for Japanese business days, holidays, wareki dates and tax calculations

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

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