Names of days

There are 7 days in English:

1. Sunday
2. Monday
3. Tuesday
4. Wednesday
5. Thursday
6. Friday
7. Saturday

Example conversation in english about days:
A : What day is it today?
B : It is Friday

A : Is it Sunday?
B : Yes, it is / No, it is not

The preposition before name days use "on", ex:
A : I don't go to school on Sunday
A : I like to go shopping on Friday