When Rita displays dates and times for you to select, she will do so based on the language that is set in your browser.
If you notice that the date-picker/calendar are displaying incorrectly, it may be due to the language you have set in your browser.
As an example, if your browser language is set to 'English (United States)', your dates will display in the US format (mm/dd/yyyy), whereas if your browser language is 'English (United Kingdom)', the dates will be displayed in a different format again (dd/mm/yyyy).
To change your browser language, follow the steps for your browser outlined in the following linked articles:
Don't hesitate to contact Customer Care for support.