Do futures hours change in Hawaiʻi when the mainland changes its clocks?
Yes. Hawaiʻi stays on HST all year, but CME sets futures hours in Chicago time, so every futures time in Hawaiʻi moves one hour when the mainland changes its clocks. On Sunday, November 1, 2026, everything moves one hour later: the futures week opens at 1:00 pm HST instead of 12:00 pm. On Sunday, March 14, 2027, everything moves back one hour earlier.
Which dates matter for a Hawaiʻi trader?
Five dates in the next year move your trading day. Two are UK dates, and three are US dates.
| Date | What changes | What it means in HST |
|---|---|---|
| Sun, Oct 25, 2026 | UK clocks go back | London open: about 9:00 pm to about 10:00 pm |
| Sun, Nov 1, 2026 | US clocks go back | Futures open 1:00 pm, pause 12:00 pm to 1:00 pm, Friday close 12:00 pm, New York open 4:30 am, big reports 3:30 am |
| Sun, Mar 14, 2027 | US clocks go forward | Futures open 12:00 pm, pause 11:00 am to 12:00 pm, Friday close 11:00 am, New York open 3:30 am, big reports 2:30 am |
| Sun, Mar 28, 2027 | UK clocks go forward | London open: about 10:00 pm to about 9:00 pm |
| Sun, Nov 7, 2027 | US clocks go back | Every US time moves one hour later again |
What is the odd week in late October?
From October 25 to November 1, 2026, the UK has changed its clocks but the US has not. London opens at about 10:00 pm HST while the US futures times stay on their summer schedule.
The same thing happens in spring, from March 14 to March 28, 2027: the US times move earlier, but London still opens at about 10:00 pm HST.
What should I update on the clock change?
Update anything you set in HST by hand. Your trading platform shows exchange times correctly, but your alarms, notes and written plan do not change by themselves.
- Phone alarms for your session.
- The session times in your written trading plan.
- Alerts or automated tools set to fixed HST times.
- The session tags in your journal, so summer and winter trades still compare.
Does Tokyo change?
No. Japan does not change its clocks, so the Tokyo open stays at 2:00 pm HST all year.
Common mistakes
- Assuming your alarms update when the mainland clocks change.
- Using the US date for London. The UK changes on the last Sunday of October and the last Sunday of March.
- Comparing summer and winter trades by HST time without noting the shift.
Sources
- NIST: Daylight saving time
- GOV.UK: When do the clocks change?
- CME Group trading hours
- IANA time zone database
Last reviewed: 2026-10-16
Read next
- Futures market hours in Hawaii time
- The free Hawaiʻi Futures Cheat Sheet
- All futures questions, answered
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Mahalo for reading and trade well!
Glenn & Reid | Hawaiʻi Trading Academy
Risk disclaimer: Education only. Not financial advice. Trading futures involves substantial risk of loss. Futures are not suitable for every investor, and you can lose more than your initial deposit. Examples on this page use made-up numbers to teach the math. Past performance does not guarantee future results. Hawaiʻi Trading Academy provides education only. We are not financial advisors, and nothing on this page is a recommendation to buy or sell any financial product. HTA is not affiliated with CME Group or any exchange or agency named here. Times, rules and dates can change; check the source before you trade.
