Please don't change the format of dates without good reason. Most British people and many people internationally write dates in day-month-year order, e.g., 12 December 1904. Most Americans use month-day-year order, e.g., December 12, 1904. If the article is about an American topic, use month-day-year. If it is a British or European topic, use day-month-year. If neither, leave it as originally written. Many Americans or British people take offence if an article about their country, written in their local version of English, is changed around to a version they don't use. So please do not do that.
If you have any questions about this, ask me on my talk page, or place {{helpme}} on your talk page and someone will show up shortly to answer your questions. Enjoy your time on Wikipedia. Thank you.

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