System Attributes
System attributes and variables are set by the system and contain data such as the current date, detected age, time and much more.
System attributes are set by the system Plural, so you can use them in various elements such as conditions, user attributes and variables, save user input or use them in any other element.

For better understanding we have some examples for you:

In this example project for Pepper, the system attribute Time is used in a Condition element to compare times. If it is before 10:00, the greeting variable (which is a custom variable because it is not set by the system, but by the user) is set to the greeting "Good morning!". After 18:00 the greeting changes to "Good evening!".