How you write the date depends on where you live. Most of the countries of the world write it day first, then month, then year, or dd/mm/yyyy. A few places put the year first, which is what computer programmers would prefer, and please don’t abbreviate the year. The U.S. is, once again, contrary in that we write the month first.
But even more than the U.S., there is one country whose date-keeping stands out: Canada. Canada accepts all types of date formats. From Prince Edward Island to Vancouver—you can pretty much write the date however you like. No holds barred. This obviously raises questions: how does this make sense? Do people really have no standard way of noting the days? Is this even legal?
Canada is trying to to standardize the date format, but it will take time. Read about dates and how they are written at Atlas Obscura.