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Note: You can mix character and numeric variables in the CALL MISSING routine argument list. SAS reads this as 1003329900. Use procs above, which respect date format.

SAS datasets will have a period as a value for missing data. Representing dates as the number of days from a reference date makes it easy for the computer to store them and perform calendar calculations, but these numbers are not meaningful to users. What I want to do is to change the name filename each day to the date literal.

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SAS Date Values SAS software represents dates as the number of days since a reference date. The reference date, or date zero, used for SAS date values is 1 January 1960. For example, 3 February 1960 is represented by SAS as 33. The SAS date for 17 October 1991 is 11612. SAS software correctly represents dates from the year 1582 to the year 20,000. Dates represented in this way are called SAS date values. Any numeric variable in a SAS data set whose values represent dates in this way is called a SAS date variable. Representing dates as the number of days from a reference date makes it easy for the computer to store them and perform calendar calculations, but these numbers are not meaningful to users. However, you never have to use SAS date values directly, since SAS automatically converts between this internal representation and ordinary ways of expressing dates, provided that you indicate the format with which you want the date values to be displayed. Formatting of date values is explained in the section. Century of Dates Represented with Two-Digit Year Values SAS software informats, functions, and formats can process dates that are represented with two-digit year values. Thus by default the year '17' is interpreted as 2017, while the year '25' is interpreted as 1925. SAS Date Constants SAS date values are written in a SAS program by placing the dates in single quotes followed by a D. The date is represented by the day of the month, the three letter abbreviation of the month name, and the year. For example, SAS reads the value '17OCT1991'D the same as 11612, the SAS date value for 17 October 1991. SAS datetime values represent the date and time as the number of seconds the time is from a reference time. The reference time, or time zero, used for SAS datetime values is midnight, 1 January 1960. Thus, for example, the SAS datetime value for 17 October 1991 at 2:45 in the afternoon is 1003329900. To specify datetime constants in a SAS program, write the date and time in single quotes followed by DT. To write the date and time in a SAS datetime constant, write the date part using the same syntax as for date constants, and follow the date part with the hours, the minutes, and the seconds, separating the parts with colons. The seconds are optional. For example, in a SAS program you would write 17 October 1991 at 2:45 in the afternoon as '17OCT91:14:45'DT. SAS reads this as 1003329900. SAS time values are just like datetime values, except that the date part is not given. To write a time value in a SAS program, write the time the same as for a datetime constant, but use T instead of DT. For example, 2:45:32 p. Time values are represented by a number of seconds since midnight, so SAS reads '14:45:32'T as 53132. SAS time values are not very useful for identifying time series, since usually both the date and the time of day are needed. Time values are not discussed further in this book.

I expect your data has been met for your database. But, if your date is a character string and you want to create a numeric variable with a date value number of days since Jan 1, 1960then the INPUT function is what you need to use. Hi: You did not prime how you are doing the import PROC IMPORT, DATA step program or what your original file is Excel, text file, CSV, etc. In this section, we'll just take a look at a few quick examples to illustrate some of the other informats and formats available in SAS. The Medico statement in the following DATA step uses formatted input and pointer controls. In SAS Missing values for numeric variables including date variables appear as a period. It's the curse of teaching -- needing to show the steps to the solution. For details about the styles of input, see the Met statement in SAS Language Reference: Dictionary. Spot checking it becomes trivial. You can use IFN and IFC functions, which evaluate both true and false conditions regardless of the boolean, but in this case RETAIN is probably easier.