Beginning in SAS 9, the ANYDTDTE, ANYDTTME, and ANYDTDTM informats are
able to read many different variations of date, time, and datetime
values.  Typically when a numeric informat reads an invalid value, an
INVALID DATA note is written to the log, _ERROR_ is set to 1, and the
variable being read is assigned a missing value.  The ANYDT* informats
do not produce an INVALID DATA message or set _ERROR_ to 1 if the
input text cannot be interpreted as a date, time, or datetime value,
however the variable being read is assigned a missing value.

You can use a specific informat (such as IS8601DT) to obtain the
typical informat behavior when invalid data is encountered.  Refer to
 #011206  for more information about IS8601* informats.

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