About Date/Time Values in Expressions

You can specify date and time values in an expression; for example:

#{System.currentDateTime}

or

#{currentTask.taskInfo.expireDate}

These date and time values are evaluated as follows:

If a given data element within an expression is a java.util.Date type, it is automatically converted into epoch time in milliseconds as a java.lang.Long type. Therefore, all arithmetic and comparison operators can be applied to that value, as it now exists as a long number.