How To Write A Date In A Formal Letter . Dates should be formatted by day and month followed by a comma and year, for example, 10 june, 2010. In terms of formality, you can show respect on a formal document by writing out the entire date, but feel free to keep the date on an informal letter short and sweet. You Can See This New English Date format In Letter At New English Date from www.pinterest.es Insert a blank line space. How to write a formal letter, formal letter examples, topics and types like letter to the editor, letter to the principal, job application and more. Learn how to write the date in different parts of the world and various situations.