Zoho Reports has now introduced a new settings page that is specific for each reporting database. You will be able to manage your database preferences from this settings page. With this option, you will be able to configure a wide range of options such as starting day of the week, starting of a financial year, data backup and so on.
To access the settings page, click the Settings button in the Explorer tab of your database.

Refer to this help documentation to know about the available options.