I have the formula below which states that if NOW is greater than the
Time in B1 (which is 3:00pm) then return NOW, oherwise return 3pm.

=IF(NOW()B1,NOW(),B1)

How would I construct a formula that says if the days is any day other
than Tuesday or Wednesday, then use the formula above, but if it is
Tuesday or Wednesday, then B1 should be 8:00pm?

Thanks