This is the 509th most frequent German word.
jede
"Jede" means "each" or "every" in English.
Jeder in this sentence is used as an indefinite pronoun in the singular form to refer to each day individually.
Jeder Tag bringt neue Möglichkeiten.
Every day brings new opportunities.
Jede is used here as an attributive adjective modifying 'Person,' showing that the subject knows each individual present.
Ich kenne jede Person in diesem Raum.
I know every person in this room.
Jedes is used as an attributive adjective to describe 'Mal,' indicating each instance of the event.