Either is correct depending upon the usage. Reminisce is a verb. Upon and about are prepositions.
Upon can be used in lieu of on the occasion of; such as in the sentence, "She likes to reminisce upon her child's first Christmas."
About is often used as a substitute for of, concerning, and in regard to; such as in the sentence, "They often reminisce about their wedding day."
The correct spelling of the verb is to reminisce (revisit memories, think back).
The correct spelling is "memoriam" as in the phrase from Latin "in memoriam" (in memory of).
Re-
Reminiscent is the adjective form of reminisce. For instance, The song by Bruno Mars was reminiscent of funk from the 1970s.
Reminiscent
Yes, it is correct to say "reminisce about old memories." The word "reminisce" means to recall past experiences or events, so it is redundant to include the word "old" before "memories."
To reminisce is to look back upon times past but not necessarily with sadness.
The word reminiscing is a form of the verb reminisce, also used as a gerund. One could "reminisce" or spend time "reminiscing."
"Upon" is correct. It is a more formal term for "on."Mary called upon her friendI sat upon my horse.Once upon a time, . . .Apon is not in the English dictionary.
The correct spelling of the verb is to reminisce (revisit memories, think back).
The correct spelling is "memoriam" as in the phrase from Latin "in memoriam" (in memory of).
The past tense of reminisce is reminisced.
Every now and then, I tend to reminisce about the past.
Reminisce Cafe was created on 2008-02-01.
Reminisce - artist - was born on 2008-05-28.
they probably do both...
But he had to stop and reminisce about the stranger's peculiar character.