Detect United States style dates

Small function which will return true if the browser renders a date in MDY style when using locale format. e.g

01/31/2020 -> returns true

31/01/2020 -> returns false

Devices tested

Code was tested by switching devices from UK (en-GB) to US (en-US).

"Worked as expected" means: Detected US style dates when the system language settings was set to en-US

MacOS 10.15:

• Safari, Chrome & Firefox worked as expected

iOS

• Safari, Chrome & Firefox worked as expected

Windows 10:

• Edge & Chrome worked as expected
• Firefox worked as expected but required changing language in browser settings

Android 5.1

• Chrome worked as expected