Beginning in SAS 9.2, the Base SAS EFI, PROC IMPORT, and Import Wizard
sampling algorithm used to determine if a value is a DATE, TIME, or
DATETIME has been changed.  The value is read in using both a TIME and
DATETIME INFORMAT, and the results of those two reads are used to
determine the correct informat for the input value.  The algorithm is
illustrated below.

Time Informat   Datetime Informat                       Read Value As
-------------   -----------------                       -------------
missing         non-missing, timepart(datetime) eq 0    date
missing         non-missing, timepart(datetime) ne 0    datetime
non-missing     missing. or eq time value               time
missing         missing                                 character

For consistent results, use colons rather than slashes as separators
between the hours, minutes, and seconds of time values.  Using slashes
may cause the value to be incorrectly read as a date.

Due to the first sampling guideline, if a DATETIME has an empty time
portion (e.g. 00:00:00) the value is read as a date, not a datetime as
in previous releases.

Operating System and Release Information