I means "goodbye us Monday" as written. Perhaps "Adiós nos vemos el lunes" would be better - "Goodbye, we'll see each other Monday."
You can say "ayer fue lunes". Note that days of the week are not capitalized in Spanish.
Lunes de Pascua
Monday.
If what you want is a translation, "El lunes por la tarde" is Spanish for "Monday afternoon".
"Hoy es el lunes" means "Today is Monday" in Spanish.
Cuanto estará el dólar para el lunes
Estare a casa el lunes = (I'll) be home Monday Be home Monday (imperative) = Este a casa el lunes
My best guess is that this is "El lunes estudio el francés. ¿Te gusta Francia?" This would mean "Monday I study French. Do you like France?"
El Cuarteto de Nos was created in 1980.
What are you wearing on Monday?
Apparently it is named after the Moon, just as in English. Moon, in Spanish, is "luna".
I'll see you on Monday.