Change the language or time zone on iCloud.com
You can use Settings on iCloud.com to change the language and time zone for all the features on iCloud.com. You might want to change the time zone if you travel to a new time zone and want your calendar events to show up at the local time in Calendar on iCloud.com.
Note: Changing the language or time zone on iCloud.com doesn’t change the language or time zone for other websites, your web browser, or other apps on your computer.
Change the language on iCloud.com
In Settings on iCloud.com, tap the current language, then choose a new language.
Change the time zone on iCloud.com
In Settings on iCloud.com, tap the current time zone below Time Zone / Formats.
Tap the map near the place whose time zone you want to use.
The time zone you selected and the name of a city near where you tapped are displayed at the bottom of the map. To pick a different city in the selected time zone, tap the city name, then choose a different city.