For a UK-based clock, the Nasdaq regular session opens at 13:30 GMT from Monday 26 October through Friday 30 October 2026. The UK changes its clocks on 25 October; the United States stays on daylight time until 1 November, so the usual one-hour offset changes briefly. Nasdaq lists its regular session as 9:30 a.m. to 4:00 p.m. Eastern on weekdays, a schedule also stated in the SEC's investor guidance. The UK and US change dates come from the UK Government clock calendar and NIST's daylight-saving rules.
That is a calendar conversion, not a claim that price behaviour or liquidity changes with the clock. If you watch a broker's CFD rather than the Nasdaq cash session, its own instrument schedule still matters.
The 2026 UK-time schedule
On an ordinary weekday, the published Nasdaq cash open maps to these UK clock labels around the autumn changes:
| Date | UK clock | Nasdaq open in UK time |
|---|---|---|
| Through Friday 23 October | British Summer Time (BST) | 14:30 BST |
| Monday 26–Friday 30 October | Greenwich Mean Time (GMT) | 13:30 GMT |
| From Monday 2 November | GMT | 14:30 GMT |
The UK Government dates the return to GMT at 2 a.m. on 25 October 2026, with the clock moving back one hour. NIST dates the US return to standard time at 2 a.m. local time on 1 November 2026. Nasdaq's opening time is 9:30 a.m. Eastern, and the SEC independently describes regular exchange stock hours as 9:30 a.m. to 4:00 p.m. Eastern. Put those published schedules together and the middle week is the exception; the conversion is arithmetic, not a separate market forecast. Recheck the UK calendar, NIST rules, Nasdaq schedule and SEC explanation if a date changes or you are reading this in another year.
A clock check that travels with your plan
Write down the zone as well as the time. “The open is at 13:30” is ambiguous once the calendar changes; “13:30 GMT, Nasdaq regular session, 26–30 October 2026” can be checked later.
Use this small routine before setting an alert or reviewing a session:
- Start with the exchange or event owner's published time, not a copied calendar card.
- Record its zone, the date, and the destination zone shown by your calendar or chart.
- Recalculate on both sides of each local clock-change date. Do not assume London and New York change on the same Sunday.
- If you trade a broker-listed CFD, check that exact symbol's hours separately. The exchange's cash schedule does not establish a broker's CFD session.
- Keep the converted time with the plan and review record. If the labels do not agree, fix the calendar entry before relying on it.
This complements our pre-event session checklist, which separates an event's source and time zone from the instrument and account you actually use. Our guide to daylight-saving changes in cTrader backtests covers a different problem: whether historical strategy logic handled the clock correctly.
What this conversion does not tell you
The table converts the Nasdaq regular-session opening time into the UK civil time used on each date. It does not define every broker's hours, a forex session, an index CFD's trading break, or the time shown by a particular chart. Check the relevant provider and instrument before using the conversion operationally.
It also says nothing about expected volatility, spreads or a trading edge. A one-hour calendar shift changes when an appointment appears on your clock; it does not supply a reason to trade. That distinction is part of the reproducibility standard at realbacktesting: keep the input and its source visible, then limit the conclusion to what they establish.
Frequently asked
Does the US market open at 13:30 UK time all autumn?
No. In 2026, 13:30 GMT applies to the UK workweek of 26–30 October. Before the UK clock change and after the US clock change, the Nasdaq regular open maps to 14:30 on the UK clock.
Is 13:30 GMT the opening time for every US-market CFD?
No. It is the UK-time conversion of Nasdaq's published 9:30 a.m. Eastern regular-session open. A broker's CFD schedule can differ, so check the exact instrument specification.
Will the shift change my cBot's schedule automatically?
This article does not establish how a particular cBot, broker server or chart handles time zones. Check the platform's displayed clock and the strategy's documented schedule, then compare them on dates before and after the local clock change.