Short answer: CBP does not publish official “cancellation windows.” What applicants and monitoring tools observe: cancellations can appear at any time, with some clustering in early morning (roughly 5–8 AM local) and mid-afternoon (2–4 PM), and often more activity Tuesday–Thursday than on weekends. Slots usually reappear within minutes of a cancellation and are often taken within seconds. So “what the data shows” is: there’s no guaranteed window—the only way to reliably catch openings is to monitor the scheduler continuously (e.g., via appointment alerts) or check very frequently. See When Is the Best Time of Day to Check for Global Entry Cancellations? and How Global Entry Appointment Cancellations Actually Work.
What “Data” Exists
There’s no public CBP dataset on when users cancel appointments. What we have: self-reported patterns from applicants and behavior observed by appointment alert services that monitor the scheduler. Those observations suggest cancellations are distributed throughout the day and week, with some concentration in early morning and mid-afternoon and midweek—likely when people wake up, change plans, or clear their calendars. It’s not a fixed “window”; it’s a tendency.
Why Windows Aren’t Enough
Even during “peak” windows, slots are shared by everyone. One slot that opens at 6 AM can be taken by 6:01 AM. So checking only at “peak” times still means you might miss most openings. The practical approach: use an appointment alert (e.g., GE Finder) that watches the scheduler 24/7 and notifies you the moment a slot opens at your chosen centers—so you don’t have to guess the window.
Frequently Asked Questions
When do most Global Entry cancellations occur?
CBP doesn’t publish this. What applicants and monitoring tools observe: some clustering in early morning (5–8 AM local) and mid-afternoon (2–4 PM), and often more activity Tuesday–Thursday. Slots are taken in seconds, so monitoring 24/7 via alerts is more reliable than guessing a window.
✅ Key Takeaway
There’s no official cancellation window. Use appointment alerts so you’re notified whenever a slot opens—no guessing required.