Observed arrival · 2026-10-18
E39Calendar: an almanac with its test bench exposed
A Japanese calendar tool for browsing traditional almanac entries, with controls for checking dates, boundaries, and calculation data.
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✦Pretty
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◎Niche
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ƒJS
- For
- Japanese calendar users checking traditional almanac dates
- Worth noticing
- It reports 22 2026–27 miscellaneous-seasonal-date checks against Japan’s National Astronomical Observatory, while marking other values unverified.
Field notes
Beyond the month view, the page exposes a specialist test bench for 2020–2050: users can inspect Japanese-standard-time boundary transitions, compare longitude-based time corrections, and save verification or discrepancy CSVs. It lists cities from Sapporo to Naha and allows manual longitude entry. The site says its old-calendar and rokuyo values remain unverified for some periods, and specifically flags the 2033 leap-month problem.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
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