ToffeeLab Korean lunar / Gregorian calendar reference

Source: Korea Astronomy and Space Science Institute (한국천문연구원)
Dataset: 한국천문연구원_음양력 정보
Official listing: https://www.data.go.kr/data/15012679/openapi.do
KASI API directory: https://astro.kasi.re.kr/life/pageView/31
Access and terms reviewed: 2026-10-06
Usage scope displayed by both official listings: 이용허락범위 제한 없음 (no usage restrictions).

ToffeeLab directly acquired the Gregorian 1900-01-01 through 2050-12-31
date mappings from the HTTPS getLunCalInfo API. The distributed month table
is a compact representation of 55,152 official daily numerical records.
Calendar version: kasi-lunar-1-6267a6ad1e44
Original successful responses, capture times and checksums are retained in
the project source archive for offline verification. Source records are
not fetched at runtime. No user birth dates or API credential are included.

This attribution does not imply KASI endorsement. Matching the calendar
records does not certify Saju interpretation, solar-term accuracy, or
historical clock rules. Future official revisions require a new reviewed
snapshot; the browser does not silently update this version.

한국천문연구원 음양력 정보 API의 날짜 대응 자료를 직접 확보해 월 단위 표로
변환했습니다. 사용자 입력은 브라우저 안에서 처리하며 외부 API로 전송하지
않습니다. 한국천문연구원이 토피랩이나 사주 풀이를 보증·추천한다는 뜻이 아닙니다.