díadaynoun, m.FM½×¡Que tenga un buen día!Have a nice day!Note: Día is masculine even though it ends in -a.
mañanatomorrowadverbFM½×Mañana trabajo hasta las seis.Tomorrow I work until six.Note: Mañana also means “morning”.
lunesMondaynoun, m.FM½×La tienda está cerrada el lunes.The store is closed on Monday.Note: Days of the week are not capitalized in Spanish.