'I have graduated from' or 'I graduated from'

[subhajit123]

Which one is correct?
'I have graduated from Xxx university', or 'I graduated from Xxx university"
Hi everyone, I know we cannot use present perfect tense if a time frame is mentioned. So we cannot use a sentence like 'I have graduated from Xxx university in 2011.' But what about the above two sentences? Are they both correct?

 

[GoesStation]

In most contexts only the simple past would be correct. The only case I can think of with the present perfect requires some emphasis:

A. You'd understand this if you'd graduated from Yale.

B. I have graduated from Yale!