Matthew 24:36

Greek οὐδεὶς οἶδεν

• οὐδεὶς: Indefinite pronoun, nominative singular masculine, meaning "no one" or "nobody."
• οἶδεν: Verb, third person singular, perfect indicative active of "οἶδα" (oida), which is the perfect tense form meaning "he/she/it has known" or "he/she/it knows."

So, "οὐδεὶς οἶδεν" in terms of the perfect tense specifically translates to "no one has known" or "nobody has known," emphasizing the completed action with ongoing relevance.