This is the 1302nd most frequent German word.
morgen
"morgen" means "morning" or "tomorrow" in English, depending on context.
Here, 'morgen' is used to indicate a time reference, specifically the day after today, meaning 'tomorrow'.
Ich werde morgen meine Hausaufgaben machen.
I will do my homework tomorrow.
In this sentence, 'morgen' again refers to the day following today, used as a noun meaning 'tomorrow'.
Morgen ist ein neuer Tag.
Tomorrow is a new day.
Here, 'morgen' is used as 'der Morgen', which means 'the morning', a different usage referring to the early hours of the day.