This field shall indicate the number of days the client would like to return the setpoint values for and could be any combination of single days or the entire week.
This field shall indicate the mode the client would like to return the set point values for and could be any combination of heat only, cool only or heat & cool.
Input to the Thermostat getWeeklySchedule command
See
MatterSpecification.v13.Cluster § 4.3.10.5