Terms of use & sources

Calendar verification record

Verified on 26 October 2026 (UTC)

Gregorian date

1950-01-01 – 2035-12-31

Dates checked

31,411

Differences found

Sources & methods

Hong Kong Observatory conversion tables · tyme4ts@1.5.3

This record was generated by the maintenance team; it is not official certification or a live check. Zero differences applies only to the listed dates, engine version and source snapshots, not to all tools or dates outside the range.

Download verification record and source hashes (JSON) ↗

The MIT-licensed tyme4ts 1.5.3 engine was independently compared with Hong Kong Observatory tables for every date from 1950-01-01 to 2035-12-31: 31,411 dates, zero differences, with reverse-conversion checks. This is not an official service or a live official API. Rule version: 2026-10-24.1. Regional display settings do not change the underlying Chinese calendar.

Chinese lunar conversion: 1950–2035. Gregorian calculations: 1900–2199. Leap months remain distinct from regular months.

This Chinese zodiac tool changes year on Chinese Lunar New Year, not 1 January or the Start of Spring solar term.

Age increases on the anniversary. For 29 February, this tool uses 1 March in common years; this is not a legal eligibility decision.

Singapore dates use Asia/Singapore. Lunar results use the verified Chinese calendar; festival dates do not establish Singapore public holidays or any family's religious practices.

Explanatory content; local customs and official rules should be checked for your situation.