Test a valuie to see if is valid and can be represented here.
NTFS filetimes are 64-bit unsigned integers, stored in Intel (least significant byte first) byte order. They determine the number of 1.0E-07 seconds (1/10th microseconds!) past WinNT "epoch", which is "01-Jan-1601 00:00:00 UTC". 28 May 60056 is the upper limit