Grace period in Texas and week ends

[Jean B.]

This is for a Texas property/lease.

My lease states that Rent is due on the 1st, but if the landlord has not actually received the rent by the 3rd day of each month (Grace period), tenant will pay late charges of $50.

How does this work when the 3rd Grace period day falls on a Saturday ? If the landlord does not get my rent payment until Monday, do i get charged late fees for Sunday (4th) do late fees start Monday?