Date & time Change the date and time — Use the Date & Time Settings to alter the date or time. Calendar appointments — Display your appointments in the calendar area at the top of the screen. Change your timezone — Update your time zone to your current location so that your time is correct. Add a world clock — Display times in other cities under the calendar. Daha Çok Bilgi User & system settings — From hardware control to privacy settings, make GNOME work for you.