I don't know of a rule, but it is not so uncommon in my neck of the woods to hear: 'The time passes so quickly', (usually, as in the case of Victory Country's question, when speaker and listener share an assumption about the reference period.)
0Hi Anon,02br 02br 00"has passed" isn't past tense - it's present perfect. You're right, "quick" doesn't sound good, but "quickly" sounds just fine. "The time has passed so quickly" is so commonly said that it might as well be an idiom.02br 02br 00It's always great to have new contributors, but perhaps you might be interested in threads that are more recen