How do I change the time zone and date format in webmail[Horde]?

We will cover how to change the timezone setting in the Horde, Roundcube, and SquirrelMail of webmail clients.By default it  will use the server location time zone, however you can configure this to operate in whatever time zone you wish.Once you change the time zone setting, the interface displays time stamps in the new time zone the next time you log in to webmail. Follow the appropriate procedure below to change the time zone setting for your webmail application.

Please note that you can refer the below procedure to time zone in Horde

1. Login into your Webmail. 
2. Click on Settings –> Preferences –> Global Preferences
3. Click on Locale and time
4. Choose your Timezone
5. Click on Save