Hi Liz,
Thank you for reaching out to the Microsoft Community.
The "Create Event" popup you're seeing is a smart feature in Excel (especially in Microsoft 365) that detects time or date entries and tries to offer quick actions—like adding a calendar event via Outlook.
To stop this "Create event" suggestion from popping up:
1: Format Cells as Text (Prevent Date/Time Triggers)
If you're entering time (like "7:30 AM") and don't need it to act like a date/time field:
Select the cells where you're entering times.
Right-click > Format Cells.
Choose Text as the format.
This avoids Excel interpreting the entry as a schedule-related field, which prevents the smart "Create Event" popup.
2: Disable Office Add-ins or Suggestions
This popup might also be tied to Office intelligent services or an Outlook add-in. You can try:
Go to Home > Add-ins > My Add-ins.
Look for anything like "Outlook" or "Calendar Suggestions" and disable it.
We hope this clarifies the behavior. Let us know if you need further help!
Kind regards,
Clover-L – MSFT | Microsoft Community Support Specialist