I want to have a "date due" to be 7 days after the "date out" unless the
student option=true, then I want the "date due" to be 1 day after the "date
out." This is what i have so far:

=IF(G3=True,D3+1,D3+7)

This function works EXCEPT that until a date is entered in the "date out"
cell, the "date due" reads 1/7/1900. I want the "date due" to be blank until
a date is entered into the "date out" cell. HELP!