These are the days of the week in English, and Spanish.
Our calendar begins on a Sunday, but the Spanish calendar begins on a Monday.
There is a song to remember this:
“Hay siete, Hay siete, Hay siete días de la semana...
lunes, martes, míercoles, jueves, viernes, sábado, domingo”
REAL LIFE SITUATION: There is an exchange student from Puerto Rico named Pablo who is your partner for a Spanish project. On a Tuesday, Pablo asks his partner, "qué días es manana. Then you would reply with "Míercoles" (Wednesday)
Here is a video that provides an example on remembering the days of the week