Change date and other regional formats used on iCloud.com
You can change the regional formatting used to display dates, times, numbers, and currencies on iCloud.com that are different from the language used throughout iCloud.com.
For example, if the language for iCloud.com is set to English, but the regional formatting is set to Spain, then dates in certain iCloud features appear in the format for Spain.
In Settings on iCloud.com, tap the current region below Formats.
Tap the Formats pop-up menu, then choose a geographic region to use its date, time, number, and currency formats.
To change the language used to display the formats, deselect “Make formats match language,” tap the pop-up menu that appears, then choose a language.