One date. A clear answer.

Annual holiday dataset, open data.

One row per exchange and holiday for every loaded calendar: notice dates, actual closure span, reopening and night-session resumption, source URL, source-check dates. Licensed CC BY 4.0 — attribute “Markets Open, marketsopen.today” and keep the data_version.

JSON · 2026 CSV · 2026

Two questions about a night session.

The evening of 8 October can be scheduled while the overnight component assigned to the 8 October trading date is absent.

{
  "market_id": "SHFE",
  "date": "2026-10-08",
  "night_session": {
    "basis": "civil_evening",
    "civil_date": "2026-10-08",
    "trading_date": "2026-10-09",
    "has": true,
    "reason": null,
    "applies_to": "Eligible night-session products only"
  },
  "incoming_night_session": {
    "basis": "trading_date",
    "trading_date": null,
    "civil_date": null,
    "has": false,
    "reason": "post_holiday"
  },
  "settlement": null
}

Night-session date contract · engine 1.2.0

Read civil_date and trading_date only when has is true. When has is false or null, both dates are null, including day-only products. For SHFE on 2026-10-08, the incoming night session did not occur; that evening’s scheduled session belongs to 2026-10-09.

Coverage, including the gaps.

Coverage is recorded independently for each market and year. NB and SB are official Stock Connect trading-day scopes, not settlement calendars. SGX A50, CME equity index, COMEX/NYMEX metals and energy, CBOT grains and ICE Brent have distinct annual scopes; SGX iron ore uses its separate local-date schedule. Calendar coverage remains specific to the stated scope.

Useful defaults, with an explicit scope.

Local-date intervals are available from /api/v1/schedules. SGX iron ore; CME equity, metals and energy; ICE Europe Brent. Annual /status uses each venue’s stated product group, not an exchange-wide assertion. Schedule version 2026.09.28.2。

Traceable sources. Source-check dates.

The DCE, CZCE and CFFEX 2026 calendars rest on saved official annual notices (SHA-256 recorded). The DCE and CZCE copies were retrieved by a server-side engine because those sites refuse direct requests. Earlier reproductions remain listed as history. Discovery links alone do not establish a calendar date.