A Climate in ecobee defines a thermostat settings template which is then applied to individual period cells of the Schedule. The result is that if you modify the Climate, all schedule cells which reference that Climate will automatically be changed.
The easiest and recommended way to manage occupied and unoccupied settings is to use the Climate for each of these modes when commanding the thermostats using Events2HVAC.
Default Climates
Smart/Si: There are four default Climates for each Smart/Si Thermostat, with possible climateRef values of "wakeup," "away," "home," and "sleep."
ecobee3: There are three default Climates for each ecobee3 Thermostat, with possible climateRef values of "away," "home," and "sleep."
EMS: There are two default Climates for the EMS Thermostat, with possible climateRef values of "occupied" and "unoccupied."
Carrier/Bryant: There are four default Climates for each Carrier/Bryant Thermostat, with possible climateRef values of "wakeup," "away," "home," and "sleep."