Did you have a great time? vs Have you had a great time?

[GeoTop]

Difference between these two sentences:

"Did you have a great time?"

"Have you had a great time?"

[Mister Micawber]

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The second enquiry refers to an adventure still in progress, or possibly very recently completed.
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_________________
Native English teacher at Mister Micawber's

[GeoTop]

[Mister Micawber]

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Your sentence with the progressive only refers to an adventure still in progress.
.
_________________
Native English teacher at Mister Micawber's