subsetting in a where clause with a date format

[tmtemples]

I'm using a date format:  FORMAT DATE MONYY5.

the data appears correctly in the dataset, but whenever I try to subset on that date, I receive an error:

36   PROC SGPLOT DATA = TOT_CLABSI  (WHERE=(DATE < "APR16"d ));
ERROR: Invalid date/time/datetime constant "APR16"d.

Please help me figure out what I'm doing wrong1

Thank you!

[Kurt_Bremser]

A SAS date constant must always include days, months and years.

Therefore you need to enter it as '01apr2016'd in this case.

[tmtemples]

Thank you! I though I needed to use the same format!

[riyaaora275]

Can you explain why we cannot use MONYY5. informat?

Eg: where ( date = "JAN95"MONYY5.)

I am not able to understand why we cannot write this

[Kurt_Bremser]

PS no matter how it is formatted, a SAS date is always a number, counting days from January 1st, 1960.