A recurring point of confusion among traders is how CME Globex behaves around a Monday holiday such as Labor Day. The short answer is that the market does not simply stay shut: it opens as scheduled the evening before, and then behaves differently partway through the holiday itself.

Labor Day, Monday, 7 September 2026, serves as a useful working example. Globex opens at its regular time of 5:00 PM Central Time (6:00 PM Eastern) on Sunday evening, 6 September. That session is not a bonus extra day of trading; it is simply the start of Monday's trade date arriving on schedule. Nothing about the open itself changes because a holiday is coming. The reason for this timing lies in how Globex is structured: because the electronic platform runs nearly around the clock from Sunday evening to Friday afternoon, the trade date for a given session begins at the 5:00 PM CT open the prior calendar evening. A Monday holiday therefore does not push the Sunday-evening open off the calendar — that open is Monday's session, not Sunday's.

What changes is what happens once Monday is underway. Instead of running through to its usual afternoon close, the session halts early, typically around midday Central Time for heavily traded contracts such as the E-mini S&P 500 (ES). This is often referred to as an "early halt" rather than a full closure, and the distinction matters: a full closure means no trading at all for that trade date (Good Friday is the clearest example on the 2026 calendar), whereas an early halt means the session simply runs shorter than normal before pausing partway through the day. The early-halt pattern also mirrors the equity market convention, where US stock exchanges such as the NYSE and Nasdaq close early (1:00 PM Eastern) on the day before certain holidays and remain fully closed on the holiday itself; CME's shortened schedule reflects the fact that many of its benchmark products price off those underlying cash markets.

Trading then resumes that same Monday evening, again at the regular 5:00 PM CT open, this time for Tuesday's trade date. From a trader's perspective, the practical effect is a single day with a shortened afternoon window rather than any gap in market access.

This pattern repeats across most Monday holidays on the exchange calendar, including MLK Day, Presidents' Day, and Memorial Day, though the exact halt time can vary slightly by product. Good Friday and days like Thanksgiving and Christmas are the true exceptions, where the day session closes outright rather than merely shortening. The precise halt and resume times are published in CME Group's holiday calendar, and because they can differ between equity index, interest rate, energy, and agricultural products, the calendar is the authoritative reference for any specific contract.

The practical takeaway: do not assume that a US market holiday means no Globex access. Check whether the day involves a Monday-style early halt or a genuine full-day closure, since the two call for very different planning around open positions and automated strategies. Traders running automated systems in particular should verify halt and resume times in advance, since a session that pauses and restarts on the same calendar day behaves differently from a normal session break.

Source: Investinglive