DateTime.FromFileTime(fileTime as nullable number) as nullable datetime
datetime value from the
fileTime value and converts it to the local time zone. The filetime is a Windows file time value that represents the number of 100-nanosecond intervals that have elapsed since 12:00 midnight, January 1, 1601 A.D. (C.E.) Coordinated Universal Time (UTC).
129876402529842245 into a datetime value.
#datetime(2012, 7, 24, 14, 50, 52.9842245)