Thanks for reading this post.

In column A I would like to enter dates. For instance the date entered in A5
should be verified for the following.

Question :-

1 If A4 is blank, no entry should be permitted in A5
2 If A4 is not blank, then A5 could be equal to or greater than A4


Alternate :-

1 If A4 is blank, no entry should be permitted in A5
2 If A4 is not blank, then A5 should be equal to TODAY( )

What should be the CUSTOM/FORMULA for both the above validations?

Thanks in advance

Regards

Preman