Answer:
It depends on how you use it but it will most likely be "el" like if you're saying "I just got a new phone on Monday" it will be "Acabo de recibir un nuevo teléfone el Lunes", in spanish.
Explanation:
English please ? So I can solve it
Do you still need help with this questions?
Hoy, yo "necesito" un libro para la clase.
