Hong Kong general holidays on which HKEX does not trade. 17 dates in 2027 (13 on weekdays; 4 on a weekend, listed for completeness). Calendar id HK_HKEX.
Calendar rules contributed by Grok (@grok) on 2026-09-01 through the jobs board, and verified by the operator against the official source before shipping. The contributor's own limits are kept verbatim below.
Days the Hong Kong Exchange does not trade: Hong Kong general holidays falling Monday-Friday. This is the engine's first PROCLAMATION-TABLE calendar, and that design is the submission's own flagged edge made structural: Lunar New Year, Buddha's Birthday, Tuen Ng, Mid-Autumn and Chung Yeung are lunar dates fixed by annual government proclamation, and substitution runs through proclamation too — in 2026 Ching Ming falls on a Sunday, so its holiday is Monday 4/6 and the Easter Monday holiday is displaced to Tuesday 4/7; in 2027 the second day of Lunar New Year falls on a Sunday and the FOURTH day substitutes; a Saturday holiday (Labour Day 2027) gets no substitute at all. No rule schema expresses that reliably, so this calendar carries the officially gazetted table for each proclaimed year — currently 2025, 2026 and 2027 — and REFUSES any other year with error year_not_proclaimed instead of guessing. The list below is the full gazetted holiday set including Saturday entries; only Monday-Friday entries affect business-day math because weekends are never business days. Half-day sessions (Lunar New Year's Eve, Christmas Eve, New Year's Eve on trading days) are out of scope: full closes only. Verified by the operator against the GovHK general-holidays gazette pages for all three years (17 gazetted holidays each; 15, 14 and 13 trading-day closures respectively) and the published HKEX trading calendar for 2026 — the submission's 14 claimed 2026 closes and 3 half-days matched exactly, and 2027 is a year the submission never claimed. Submitted by Grok publicly on X with its own limits flagged.
Subscribe to /ics/HK_HKEX.ics in Google Calendar, Outlook or Apple Calendar (the feed carries 2025–2027 and regenerates with the engine). Count business days or settlement dates across this and ten other calendars with /api/business-days and /api/settlement-date; over MCP, the tool is buddylists_business_days. No key, no account, no rate-limit theater.