Manoj came across 2 men while travelling, Jatin & Pankaj.

These two men have strange habits.

Jatin lies every Monday, Tuesday and Wednesday and the other days he speaks the truth while Pankaj lies on Thursdays, Fridays and Saturdays, however the other days of the week he speaks the truth.

They tell Manoj the following

Jatin: Yesterday I was lying.

Pankaj: So was I.

On which day of the week did they make these statements?