Although I myself prefer the ISO notation, normal people do not use it in their daily affairs.
Is it just conventional, or is there an official 'British date standard' (like with metric and imperial, for example). "fifteenth day before the calends of April" -- Anglo-Saxon Chronicle) rather than using any kind of notation. I have no sources to quote as such, but personally prefer to use a logical format starting with the lowest unit (days) and ending with the highest (years), thus the 4th of July would be most logical (to me anyway) in European format as 04/07/13, not 07/04/13..
Instead of writing May-24, we simply change the “May” to “5” and write 5-24 or ⁵⁄₂₄.
Format F is rather official and is typically seen on an invoice or an official or technical document.
Format A is extremely formal and mainly used on printed items, for example a wedding invitation.
The numerical formats may use a full stop (.) or hyphen (-) instead of a slash (/), for example: 14.3.2016 or 03-14-16 Note that another format exists which writes the date numerically in the order Year-Month-Day, for example: 2016/03/14.
Generally, the longer formats, such as B or C, are more polite (since they show more respect for the reader).
Shorter formats, such as D or E, are used in less formal situations, for example a memo, a letter between friends or an impersonal business letter.
That way it follows the natural language order and so requires no mental gymnastics to switch things around when speaking the date aloud. This isn’t usually any sort of problem because of universal consensus on how to interpret such things in the United States.
If you write day/month/year in America, you will not be understood.
There are several different ways to write the date in English.
They vary from formal to informal, and there are differences between British and American English. Note: which format to use is a question of formality, politeness and personal choice.