%DAYS(number)%DAYS converts a number into a duration that can be added to a date or timestamp value.
%DAYS can only be the right-hand value in an addition or subtraction operation. The left-hand value must be a date or timestamp. The result is a date or timestamp value with the appropriate number of days added or subtracted. For a date, the resulting value is in *ISO format.
For an example of date and time arithmetic operations, see Figure 232.
For more information, see Date Operations or Built-in Functions.