[Grammar] This Monday or on Monday

[mrmvp]

Are the following sentences grammatical, if yes what is the difference between them?

1-I will buy the car this Monday.

2-I will buy the car on this Monday.

3-I will buy the car on Monday.

 

[GoesStation]

Are the following sentences grammatical? If yes, what is the difference between them?

1. I will buy the car this Monday. :tick:

2. I will buy the car on this Monday. :cross:

3. I will buy the car on Monday. :tick:

Without context, one and three mean the same thing. If context establishes a future time frame, number three means "I'll buy the car on the Monday that will fall during the period I'm talking about".