Bigcommerce / Modify Custom Date Script

I am looking for a few changes on my big commerce website. [login to view URL] 1) change the justification/alignment of the delivery date field label so it center justifies.. the field label is currently too high relative to the data values. 2) At 2pm we stop taking orders for same day delivery. Can you put an edit to prevent selecting the current date when the time is after 2pm of the current date. 3) Install a parameter file to black out specific days... for example, not allow sundays to be selected, or not allow certain holidays (Christmas, New Years Day...).