I am Office Monster and I live in air conditioning of this old good bank office in Australia.
I spent many years in venilation chanels of this building, that is why I met a lot of mysteries of a device called
thermostat. It took me long to understand how it works and now I will tell you the whole truth about it.
Thermostat action results in a change in temperature during the time. Thermostat does not give the rest for self and it controls temperature all the time.
This time which is a particular date, hour, season of the year and time in which operations take places.
So the thermostat adapts the temperature to a pattern which is called thermostat_setting.

How it looks like in particular date you will ask me. How it looks today you ask. Days and months create a date, today we can treat as date to.
Months are gathered in seasons which taking place along the year. First is summer which months are December, January and February,
in this season for operations during bissines hours thermostat_setting is 24 degrees, for operations not during bussines hours thermostat_seting is 27 degrees which is quite warm.
People are not in office usually at that time but for me this temperature is burdensome. 
Next season is autumn which months are March, April and May in this time thermostat is set to 20 degrees during bussines hours and 16 degrees not during bussines hours,
that is why I prefer autmn more than summer. After autumn it comes winter the most cold months in year: June, July and August
this is the reason that thermotat_setting is lowest in year to save the power. During bussines hours thermostat_seting is 18 degrees, not during bussines hours 14 degrees, some times I chill. 
The last season is spring: September, October, November yes I love this time,
averything wakes to life and temperature in office reflects it to, during bussines hours it is 20 degrees, not during bussines hours it is 15 degrees.

What are these bussines hours? Someone might ask. The most simple answer is the time in which people usually works. But I will tell you more details about this.
First of all you need to understand that in week there are workdays (Monday, Tuesday, Wednesday, Thursday, Friday) and weekend (Saturday, Sunday).
If today is workday operations during bussines hours take place at time between 9 am and 5 pm, before 9 am and after 5 pm operations are not during bussiness hours.
Of course if today is weekend operations are not during bussines hours too.

Now you should understand the nature of thermostat and it should have no more secrets for you.