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🌙 Lunar / Gregorian Calendar Converter

Bidirectional conversion between Gregorian and Chinese lunar calendar (1900-2100). Four modes: single-day lookup (three-pillar Ganzhi, zodiac, lunar month names, precise solar-term times), 6×7 month grid (dual-labeled Gregorian + lunar + solar term + festival), batch conversion (multi-line paste or CSV / JSON upload, up to 1000 rows), and annual lookup of 18 lunar festivals + 24 solar terms. Handles leap-month disambiguation, .ics calendar download, and URL share links. Client-side computation, no app backend, no login.

Local · No server · No login · Year range 1900–2100

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Bidirectional Chinese lunar ↔ Gregorian calendar converter covering 1900–2100. Four modes: (1) single-day lookup — solar date → lunar date with three-pillar Ganzhi (year/month/day), zodiac, Chinese month names, precise solar-term times, and festivals; reverse direction lets you enter a lunar date with explicit leap-month disambiguation (e.g., 1982 leap-4); (2) 6×7 month grid — dual-labeled cells (Gregorian large + lunar small), solar terms in red, festival chips, today highlight, month navigation arrows, mobile swipe-to-switch; right rail lists all solar terms and festivals for the current month; (3) batch conversion — paste multi-line text or upload CSV or enter JSON, bidirectional (solar ↔ lunar), up to 1000 rows, export as CSV/JSON; accepts YYYY-MM-DD, YYYY/M/D, YYYYMMDD; (4) annual festival lookup — enter a year to list all 18 lunar festivals (Spring Festival, Lantern, Dragon Head Raising, Shangsi, Cold Food, Qingming, Dragon Boat, Qixi, Ghost Festival, Mid-Autumn, Double Ninth, Hanyi, Xiayuan, Winter Solstice, Laba, Little New Year North/South, Eve) and 24 solar terms with their Gregorian dates. Download .ics calendar (RFC 5545, imports into Google Calendar / Apple Calendar / Outlook). Deep-link URL sharing. Client-side computation: no server, no login, default no ad scripts, default no third-party analytics. Bilingual zh/en native; mobile-first (375px no horizontal scroll, 44px touch targets).