Día de Conmemoración de los Caídos
Mejor:
El día de los Caídos por la Patria
Dia de los veteranos
En observancia al Día de Conmemoración
Estamos cerrados por Día de los Caídos.
monumento Also: memorial (as in a legal brief)
Memorial Day is already a noun, and it traditionally refers to a specific day in the calendar. However, if you want to use it as an adjective, you could say "Memorial Day weekend" or "Memorial Day observance" to describe events or activities related to the holiday.
No.
You can't create an adjective from memorial day. It is well known that in English one can often use a noun as an adjective. For example, one can say a memorial day ceremony.
le jour du Souvenir
"Day" in Spanish is día. Note the accent mark above the "i".
You say in spanish, as well, "menú del día".
De forma cotidiana.
The way you say Mothers Day in Spanish is "Dia de Madre".
¡Qué día!
Quel dia?