Speed up excel formatting vba code?

Question

I am using the following vba code to change a text string date into an actual date in excel so I can use it for logical comparisons and the like.

The problem is I need t

Answer 1

It would be better to get the values in to an array in one single "pull", operate on the array and write it back. That would circumvent the expensive range operation.

dim c as range
set c = Range("D2:D" & Range("D" & Rows.Count).End(xlUp).Row)

dim ArrValue() as Variant

set ArrValue = c.value

next step: iterate over that array and then write back:

c.value = Arrvalue

I have no time to test the code, so please correct it for yourself, I am sorry.