The CME Trading Calendar: Sunday Reopen, Holiday Closures, and Why Your Weekly Reset Lands When It Does

If your platform goes quiet for an hour every afternoon, or a stop order you placed on a Thursday didn't fill anywhere near your price after a weekend, the cause isn't a bug. It's the CME Globex trading calendar, and knowing its exact mechanics, not a rough sense that "markets are closed on weekends", is what separates traders who get blindsided by session boundaries from traders who plan around them. This matters even more on a funded account, where a firm's daily and weekly loss limits are usually pinned to specific clock times that echo this same exchange schedule.

When does CME Globex close and reopen each week

CME Globex, the electronic system that handles the large majority of volume across CME, CBOT, NYMEX and COMEX products, closes for the week on Friday afternoon and reopens Sunday evening. According to CME Group's published trading hours for the E-mini S&P 500 contract, the standard weekly session opens Sunday at 5:00 PM Central Time and runs, with the daily interruptions described below, through Friday's close at 4:00 PM Central Time. Central Time is the reference zone CME itself publishes in, and it sits one hour behind Eastern Time year round since both zones follow the same US daylight saving transitions, but confirm which zone your own broker or platform actually displays before you set an alarm around a session boundary.

Those four exchanges are not just brand names on a screen, they are separate designated contract markets regulated by the CFTC under Section 5 of the Commodity Exchange Act, which is part of why the published session times function as firm operating rules rather than a loose community norm. If you already think about the regular trading hours versus electronic hours split inside a single day, this is the same discipline one level up. Our breakdown of RTH versus ETH timing covers how liquidity shifts inside a day; this article is about the boundaries of the week itself.

What is the daily maintenance break and why does it matter

Between Sunday's reopen and Friday's close, Globex does not run around the clock without interruption. Monday through Thursday, most products go through a daily maintenance halt from 4:00 PM to 5:00 PM Central Time, a one-hour window in which the exchange stops accepting new orders, modifications, and cancellations while it rolls the trading date forward and runs end-of-day settlement processing. Friday's 4:00 PM close and Sunday's 5:00 PM reopen simply replace what would otherwise be the Thursday-into-Friday and Friday-into-Sunday versions of this same break with the longer weekend closure.

Not every product runs on identical minutes. Index and financial futures like the E-mini S&P 500 follow the 4:00 PM to 5:00 PM Central Time window described above, but some agricultural and livestock contracts run a different overnight session and a separate day session with their own break times. If you trade outside the index and financial complex, check the specific hours for that product group on CME Group's trading-hours page rather than assuming the equity-index schedule applies everywhere.

The detail traders underestimate is what "halt" actually means. It is not a quiet period where liquidity is merely thin, it is a full stop of the matching engine's order-entry function. A stop-loss resting in the book when the halt begins is not being watched during that hour and cannot be triggered, moved, or canceled until the engine reopens for the next session.

Order type matters here too. A day order is designed to expire automatically at the end of the session in which it was placed, so it simply stops existing once that session ends, whether or not a halt is involved. An order marked good til canceled is meant to persist across that boundary and come back live once the next session opens, but exactly how a specific broker or trading platform implements that persistence through the daily halt and the weekend close differs by vendor. Some resubmit the order into the new session automatically, others require you to re-enter it. Confirm the specific behavior with your own broker's or platform's order documentation rather than assuming a resting order survives a halt unchanged everywhere.

A maintenance halt isn't a slow market, it's a matching engine that has stopped listening.

Laid out end to end, a holiday-free week looks like this:

How many hours a week is CME Globex actually open

Put the two schedule facts together and you can work out exactly how much of the calendar week is tradeable, which is a useful sanity check for anyone building automation or comparing coverage across products. Start from Sunday's 5:00 PM reopen. From Sunday 5:00 PM to the following Friday 5:00 PM is exactly five full days, 5 x 24 = 120 hours. But the trading week actually ends one hour earlier than that, at Friday 4:00 PM, so the raw span of the week, reopen to close, before subtracting any daily breaks, is 120 - 1 = 119 hours.

Inside that 119 hour span sit four daily maintenance breaks, Monday, Tuesday, Wednesday and Thursday, each running 4:00 PM to 5:00 PM Central Time, one hour apiece. Four breaks at one hour each is 4 x 1 = 4 hours of halted time. Subtract that from the raw span and net nominal tradeable time in a holiday-free week is 119 - 4 = 115 hours.

You can cross-check the same answer from the other direction, starting from the full 168 hour calendar week (7 x 24 = 168). The weekend closure runs from Friday 4:00 PM to Sunday 5:00 PM, which is two full days plus one more hour, 2 x 24 = 48, plus 1 = 49 hours closed. Add the 4 hours of daily maintenance and total closed time for the week is 49 + 4 = 53 hours. 168 - 53 = 115 hours, which matches the first calculation exactly. That 115 hour figure is the ceiling on tradeable time in a holiday-free week, before any early close or full holiday closure shortens it further.

How CME holiday closures and early closes work

On top of the weekly and daily pattern, CME Group publishes a full annual holiday and trading-hours calendar covering both full closures, days like Christmas and Thanksgiving where most products don't trade at all, and early-close sessions, days like the day after Thanksgiving or Christmas Eve where the session runs but shuts down hours ahead of the normal daily or Friday close. Some early closes affect only certain product groups while leaving others close to a normal schedule, and the exact list of dates and shortened hours is republished every year rather than carried over unchanged.

None of this should be treated as this year's or next year's actual holiday list. Whatever a blog post, a forum thread, or last year's memory says the schedule was, check the current version on CME's own calendar page before planning a position around a specific holiday. Exchanges do occasionally adjust early-close hours or issue advisories for specific product groups, and the only version that matters is the one published for the year you're actually trading.

How session times interact with a funded account's daily and weekly reset

Prop firms that trade CME futures products build their own risk rules on top of this exchange calendar, and the way most of them describe daily and weekly loss limits leans on the same rollover point the exchange uses for itself. It's common for a firm's daily reset to sit at a fixed clock time in the late afternoon or early evening US window, close to the exchange's own daily rollover, rather than at midnight in any particular timezone. The logic tracks: the exchange already draws its own line for "which trading day a transaction belongs to" at that rollover, so a firm anchoring its own daily counter nearby keeps its numbers aligned with the exchange's own settlement and reporting rather than fighting it.

There's a related mechanical wrinkle worth knowing even outside the funded-account context: the exchange itself labels the session that begins at 5:00 PM Central Time as belonging to the next business day, not the calendar day the clock still shows. A position opened Sunday at 6:00 PM Central Time is already trading on Monday's session for settlement and reporting purposes, even though the wall calendar still reads Sunday. The same forward-dating applies to the Monday-through-Thursday 5:00 PM reopens: a fill at 5:05 PM Tuesday books to Wednesday's trading day. Firms that anchor a daily reset to the exchange's own session boundary inherit this same forward-dating, which is one more reason a fill placed in the last few minutes before a reset can land on a different day's ledger than the one your wall clock suggests.

What that means in practice is that the plain-language phrase "daily loss limit" doesn't necessarily mean a calendar day, and "weekly loss limit" doesn't necessarily mean Monday through Sunday. If your firm's daily reset happens at an early-evening clock time, a trade placed shortly before that reset can count against the next day's allotment rather than today's, even though your wall clock still reads today. Get this wrong and you can misjudge how much loss budget you actually have left, or trip a rule you thought you had another day to avoid. The exact reset time is set independently by each firm and genuinely varies from program to program, so confirm the specific clock time in your own firm's rules, dashboard, or support documentation rather than assuming it matches any figure discussed generally here.

Holiday weeks compound this. If a firm's weekly reset is pinned to the normal Friday afternoon close and that particular week includes an early close day, the exchange's own tradeable time for the week is already shorter than usual before you even factor in the firm's specific reset day or hour. Fewer tradeable hours in the week mean less time for price to reach a given stop or limit before the week's counters reset, so a position sized for an ordinary five day week can effectively carry more exposure per available trading hour during a holiday week. This is one more reason to check the exchange's actual published hours for the specific week you're trading, not just the general daily and weekly pattern, heading into any week that includes a US market holiday.

A worked example: a realistic trading week timeline

Here's how the pieces line up across an ordinary, holiday-free week for a trader running futures positions on a funded account layered on top of the exchange calendar. Times are illustrative Central Time examples; substitute your own firm's actual reset time where noted.

The practical point from laying it out this way is that the "week" your firm counts against its weekly limit may not end exactly when the exchange's own week ends. Some firms reset weekly figures at the Friday close, others use a different day or a slightly earlier cutoff. Since this detail is firm-specific and changes from program to program, treat this table as a shape to check against your own firm's documentation, not as a universal schedule.

Why a resting stop doesn't protect you across a weekend close

The daily halts are short enough that most traders never think about what happens to a resting order during them. The weekend closure is the case where the same mechanic actually costs money, and it's worth walking through with real arithmetic rather than a vague warning.

Take a hypothetical position, not a real historical trade: a trader is long 1 ES (E-mini S&P 500) contract entered at 6500.00, with a protective stop resting at 6480.00. That's an intended risk of 6500.00 - 6480.00 = 20 points. Using the CME-published ES contract multiplier of $50 per index point, the intended dollar risk is 20 x $50 = $1,000 per contract.

Now suppose, purely as an illustration, that hypothetical weekend news causes Sunday's 5:00 PM reopen to print at 6440.00, a full 6500.00 - 6440.00 = 60 points below Friday's close. The 6480.00 stop was never touched during the closure, because there was no trading to touch it, so when the market reopens already below that level, the stop cannot fill anywhere near 6480.00. Assuming a fill close to the 6440.00 reopen print, the realized loss is (6500.00 - 6440.00) x $50 = 60 x $50 = $3,000, which is $3,000 - $1,000 = $2,000 more than the planned $1,000 stop-loss, exactly three times the intended risk.

The specific gap size and fill price here are made up for illustration. The mechanic is not: a resting stop order is a promise to act at a given price once trading resumes, not a guarantee that price is still reachable when it does. This is exactly why traders who hold positions into a weekend, covered in more depth in our piece on overnight and swing trading on funded accounts, treat the Friday close as a real risk decision rather than a formality.

The honest tradeoff: what the calendar can't fix

Knowing the exact session boundaries makes you better informed. It does not make weekend gap risk go away. Nothing about understanding when Globex opens and closes changes what happens to price while the market is shut, and no trade copier, no automation, and no monitoring tool can act during a halt, because the exchange itself is not accepting order actions during that window from anyone, human or automated. A copier that mirrors positions across accounts is still bound by the same session calendar as every other participant trading that product; it cannot place, adjust, or cancel an order at a moment when the exchange isn't taking order actions at all.

Some traders address weekend gap risk with options instead of, or alongside, a resting stop, buying a protective put or call that carries its own premium cost and its own liquidity limits rather than assuming a stop order guarantees an exit price. That trades a known, paid-upfront cost for protection that isn't voided by a closed order book, but it isn't free, and not every funded-account program permits options overlays on every product, so check your firm's rules before assuming it's available to you.

The only real protections against a weekend or holiday gap are decisions made before the close: reducing size, tightening a stop earlier in the session while the market can still act on it, or simply going flat before the halt begins. If you trade around contract expiries too, the same discipline of knowing the exact mechanical boundary rather than assuming applies; see our explanation of how futures contract rollover works for the adjacent case where the calendar changes which instrument you're actually holding. The CME calendar tells you when the risk window opens and closes. What you do heading into that window is still on you.

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