How to write the date 21 December in American English?

Writing date 21 December in English can be done in a variety of ways. Here are some common ways to write the date 21 December in American English.

When you prefer to write the date in American English, usually the month comes before the day, then followed by the year. For example: The 21st day of the month December, in the year 2019, then the date in American English should be written as:


  • Dec 21
  • December 21
  • December 21, 2019
  • Saturday, December 21, 2019

Dates written as December the 21st or December 21st are not incorrect, but are less common in American English.



21 December | Write the correct date format in American English words

How to write the date 21 December in numbers?

Writing date 21 December in English can be done in a variety of ways. Here are some common ways to write the date 21 December in American English.

In American English, if you want to write the date in all-numeric, you will need to use the following style. Here, too, the month comes first, then the day, then the year.


  • 12.21.19 or 12/21/19 or 12-21-19
  • 12.21.2019 or 12/21/2019 or 12-21-2019
  • Dec. 21, 2019


The International Standard date formats

In an effort to avoid miscommunication between people using the British date format and those using the American date format, an International Standard was developed. If an Australian writes December 21, 2019 as 21/12/2019, but an American writes the same date as 12/21/2019, who’s right? The international standard recommends writing the date as year, then month, then the day: YYYY-MM-DD. So if both the Australian and American used this, they would both write the date as 2019-12-21.

Writing the date this way avoids confusion by placing the year first. Much of Asia uses this form when writing the date. For example:

December 21, 2019 would be written as 2019 December 21. (Did you notice there’s no comma?).



FAQ: 21 December correct date format in American English words


Writing date 21 December in English can be done in a variety of ways. Here are some common ways to write the date 21 December in American English.


Writing date 21 December in English can be done in a variety of ways. Here are some common ways to write the date 21 December in American English.


In American English, if you want to write the date in all-numeric, you will need to use the following style. Here, too, the month comes first, then the day, then the year. 12.21.19 or 12/21/19 or 12-21-19.


In this page, we're looking at the spelling of US date format and a few rules. 21st = twenty-first.


In this page, we're looking at the spelling of US date format and a few rules. 21st = twenty-first.


In this page, we're looking at the spelling of US date format and a few rules. 21st = twenty-first.


Saturday, December 21, 2019. Dates written as December the 21st or December 21st are not incorrect, but are less common in American English.


the 21st of December, 2019. The last two date formats are more formal. The "the" and "of" are optional but if you do use them, you must add both "the" and "of." It is incorrect to say only "21st of December" or "the 21st December."


When we say dates in English we use ordinal numbers. So for 21 December, we say twenty-first.


  • 21th or 21rd or 21st or 21nd
  • 21th or 21rd
  • 21th or 21st
  • 21th or 21nd
  • 21rd or 21th
  • 21rd or 21st
  • 21rd or 21nd
  • 21st or 21th
  • 21st or 21rd
  • 21st or 21nd
  • 21nd or 21th
  • 21nd or 21rd
  • 21nd or 21st
  • how do you write 21 December 2019
  • 21st of December
  • 21 December spelling
  • December in number form
  • 21st December or December 21st