Adjust the plan date if busy

Hi everybody,
In my local excel forum has a query:
They do planning for the task, for instance, Task 1, plan date: 15-Mar. Now, they review and findout that they are busy that day, and may be some next days.
How to assign the new plan date to closest date that is not busy.
See attachment.
I've built my solution already, but it so complicated and i am not sure it is the best!

I see a potential issue with "non-busy" days becoming busy days. For example, plan date for rows 4 and 5 (17th and 18th) are both moved to the 19th. Everything would need to be moved out. The formula would not only need to look at column I but also at previous results in col D. Hmmmmmm

Thanks Bob, it works well!
I think this is the best so far, in comparison with mine!
Simple that create a range of date and match with "busy date", we here almost quit
@ChemistB: My false, 19-Mar should be "does not change", instead of "change"

Hi bebo,
My point was, let's say we had plan dates for 16,17, 18 and 19. As the 16,17 and 18th are listed as busy days, everything is moved to begin on the 19th. When is the 19th thought of as a busy day? We are now starting 4 new projects on the 19th. How many projects can one start on the same day?

ChemistB < too analytical

What goes in the F2 list?

Edit: Nevermind. Looks like the D2 List, yes? Very nice Bob.

I 've found another formula, same result:
=INDEX(D3+ROW($1:$100)-1,MATCH(1,--ISERROR(MATCH(D3+ROW($1:$100)-1,$I$3:$I$10,0)),0))