On this version, the app only can have one schedule per day which must be within every 24 hours.
In other words, the start time and the end time must be in one day. And the start time must be before the end time.
but it is also possible If the user would like to create a schedule overnight.
To do this you can think of setting up your fan schedule to operate in a certain mode for a few hours a day and then put the default to be what you need it to be during evening and nighttime.
For example, if you like the device to work in "Auto" mode between 7 pm to 7 am and be "OFF" between 7 am to 7 pm, simply set the device to "Auto" by default and then create a schedule it to be "OFF" between 7 am to 7 pm.