Market calendars

q.calendar contains exchange-session and market-time operations. Functions require an explicit ISO 10383 market identifier; qrt never assumes one market.

Use schedule to retrieve session dates with timezone-aware local opens and closes. Holidays are omitted and early closes retain their actual close time.

stockholm = q.calendar.schedule(
    "2024-03-28",
    "2024-04-02",
    exchange="XSTO",
)

The result above contains the 13:00 Stockholm close on March 28, omits the Easter holidays, and resumes at 09:00 on April 2.

closed_days = q.calendar.non_trading_days_after(
    prices.index.to_series(),
    exchange="XNYS",
)

An early close remains a trading session. The function counts only closed calendar dates between consecutive sessions and validates every input date against the selected exchange calendar.