Dates are written traditionally in "day month year" order, using a stroke as the separator.
This order is used in both the traditional all-numeric date (eg "31/12/99") and the expanded form (eg "31 December 1999").
The month-first form (eg "December the 3rd") was widespread until the mid twentieth-century, and remains the most common format for most newspapers across the United Kingdom.
The month-first format is still spoken, perhaps more commonly when not including a year in the sentence, but is now less frequently used, having been superseded by the little-endian DMY format in most cases.
The "day month year" order is also the case in modern Welsh (eg "", "20fed Mai 1999", "").
The "month day year" order (eg "Mai 20, 1999") was previously more common than it is nowadays, it not being unusual to see a Welsh "month day year" date next to an English "day month year" date on a bilingual plaque from the latter half of the 20th century.
The 24-hour notation is used in timetables and in some computer applications; computers running Microsoft Windows with UK regional settings default to display time in 24-hour notation.