Writing and saying the date in American English (Month-Day-Year), 11-21-2027 = November 21st, 2027:
November (the)* twenty-first, twenty twenty-seven
or: November (the)* twenty-first, two thousand twenty-seven
* The definite article "the" can be left out.
Writing and saying the date in British English (Day-Month-Year), 21-11-2027 = 21st November, 2027:
the twenty-first of November, twenty twenty-seven
or: the twenty-first of November, two thousand and twenty-seven
Note:
You can place AD (or CE) before or after the year or BC (BCE) after the year. AD = Anno Domini (Latin phrase for "in the year of the Lord"). 1 AD is considered the year in which Jesus Christ was born. Example: the current year, 2019, is: 2019 AD. BC = Before Christ; years before 1 AD. There is no year zero, neither AD nor BC. Nowadays CE and BCE are also used. CE = Common Era, instead of AD The year 1 CE = The year AD 1 (or 1 AD). BCE = Before the Common Era, instead of BC
Convert the date to American and British English words