m1 visa validity

I need to book a flight a day or two before the 'intended date of arrival' that I've entered in my application. Visa Validity – on the other hand, is the period of time from which to which you can use your visa to enter and stay in the Schengen Area. The “M2 visa” is a type of non-immigrant family visa that allows the immediate family members of “M1 visa” holders to enter and remain in the United States.“M1” student visa is also a non-immigrant category, authorizing aliens to engage in a full course of vocational or non-academic study in the U.S. Your visa may be valid for the entire study period or shorter.