Editing Style Guide (section)

=== Date formatting ===

''Minr'' is an international community. That is a good thing in general, but it makes a problem for numeric abbreviations of dates, such as "12/10/11": while most countries abbreviate dates as day/month/year, some Asian countries use year/month/day, and the US uses month/day/year. So the above date could represent any of three different dates.  To avoid this problem, most dates should be written in "Month&nbsp;DD, YYYY" format, ''e.g.'' "December&nbsp;10, 2011".  Do not use superscripts or suffixes such as "April 23<sup>rd</sup>" or "4th of May".  If a numeric or terse date is needed (such as in a table), then use YYYY-MM-DD, always with 2 digits for month and day (''e.g.'', 2011-12-10 or 2012-05-04).  Besides being the [https://en.wikipedia.org/wiki/ISO_8601 ISO standard], dates in this format will naturally sort properly, say if the table column is later made sortable.