You could say "algún día".
You say in spanish, as well, "menú del día".
"Day" in Spanish is día. Note the accent mark above the "i".
The way you say Mothers Day in Spanish is "Dia de Madre".
De forma cotidiana.
To say 'I have some folders' in Spanish, you would say 'Tengo unas carpetas.'
To say 'I have some shoes' in Spanish, you would say 'Tengo unos zapatos.'
To say 'I have some calculators' in Spanish, you would say 'Tengo unas calculadoras.'
¡Qué día!
Quel dia?
Buenos dias = Good day
To say 'I want some folders' in Spanish, you would say 'Quiero unas carpetas.'
Dia. (DEE-ah)