Writing date 21 April in English can be done in a variety of ways. Here are some common ways to write the date 21 April 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 April, in the year 2019, then the date in American English should be written as:
April 21, 2019
Sunday, April 21, 2019
Dates written as April the 21st or April 21st are not incorrect, but are less common in American English.
How to write the date 21 April in numbers?
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.
04/21/19 or 04.21.19 or 04-21-19
04/21/2019 or 04.21.2019 or 04-21-2019
Apr. 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 April 21, 2019 as 21/04/2019, but an American writes the same date as 04/21/2019, 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 2019-0421-.
Writing the date this way avoids confusion by placing the year first. Much of Asia uses this form when writing the date. For example:
April 21, 2019 would be written as 2019 April 21. (Did you notice there’s no comma?).