WordPress.org

How to set up?

Go to admin panel, select 'Settings' then 'WP Change Template'. Enter a title, a start date, an end date and a theme which will be used. That's it.

Every day change?

Go to admin panel, select 'Settings' then 'WP Change Template'. Enter a title, select "every" for start date, select "every" end date , select the times and a theme which will be used. That's it.

Where is the 'WP Change Template' admin?

Go to your admin panel, select 'Settings' then 'WP Change Template'.

What happens if a theme has been deleted and there is still a rule ?

The plugin will either use another active rule or display the default template which you have choosen in the admin.

Dates and times?

They all depend on the "timezone" which you have setup in your general settings.