I'm a little surprised. I delete a file and re-create it and it still has a creation date of months ago.
Code:
v:\> echo %@filedate[iffy.btm,c] & del iffy.btm & echo foo > iffy.btm & echo %@filedate[iffy.btm,c]
2017-06-22
Deleting V:\iffy.btm
1 file deleted
2017-06-22