What does Por la manana mean?

Translated to: "I don't know morning", but in Spanish it's important to put a "~" over the first n in "mañana". The ~ makes "mañana" sound like "Man-yan-a". And an accent over the e in "sé". "Se" (without accent) would mean "itself".

That doesn't mean "I don't know morning"... it means "I don't know tomorrow", or "I don't know about tomorrow", or "I don't know what tomorrow brings". They all mean the same thing. "Mañana" means tomorrow , but "la manana" means "morning".