Writing and saying dates in American and British English

We differ and I know it is confusing.

Americans start with the month, then the date, then the year:

• July 8, 2017
  
• 7-8-17
  
• 7-8-2017
  
• 07-08-2017

We would say all of these as either:

• July the eighth, twenty seventeen
  
• July the eighth, two thousand seventeen
  
• July eighth, twenty seventeen
  
• July eighth, two thousand seventeen
  
• The eighth of July, twenty seventeen (or two thousand seventeen)

British folks start with the day, then the month, then the year:

• 8-7-17
  
• 8-7-2017
  
• 08-07-2017

However, I believe they say the dates the same way (I hope a Britisher will come along and confirm or correct).

There may be some variances to these but usually for Americans we start with the month for writing but not necessarily for speaking.

there are a myriad of ways...

July seventh, twenty seventeen
7/7/17
07/07/17
7-7-17
07-07-17
07-07-2017
2017-07-07 (this format is preferred for putting folders in chronological order)

American format is usually month | date | year

It's Friday the seventh of July where I am. Or July the seventh. We more or less say them out loud the same way, except that as with any number over one hundred, we use 'and' after the big unit - e.g. one hundred and fifty, two thousand and seventeen. We do say twenty seventeen also. When I am reading out dates fast to a colleague I might say "seven seven seventeen". When writing them we can use slashes 7/7/2017, or dots 7.7.2017 or dashes 07-07-2017. As you can see we can show the day and month as one or two digits and the year as two or four digits. I think this is true everywhere.

In China and some other countries they go YMD, but it's still logical, like DMY. The American way, MDY, defies logic.

Old fashioned legal documents used to say "on the seventeenth day of August, in the year of our Lord one thousand nine hundred and twenty-two"...

InfraBlue says you should try to be concise.

there are [a] myriad [of] ways ...

The full American way of writing out the date and time is:

M/mins/secs/D/hrs/Y

Oh and we're going back to the Julian calendar.