Editing Calendar date (section)

===Standards===
There are several standards that specify date formats:
* [[ISO 8601]] ''Data elements and interchange formats – Information interchange – Representation of dates and times'' specifies ''YYYY-MM-DD'' (the separators are optional, but only hyphens are allowed to be used), where all values are fixed length numeric, but also allows ''YYYY-DDD'', where ''DDD'' is the ordinal number of the day within the year, e.g. 2001–365.<ref>{{cite web| url = http://www.iso.org/iso/catalogue_detail?csnumber=40874| title = ISO 8601:2004 ''Data elements and interchange formats – Information interchange – Representation of dates and times''}}</ref>
* RFC 3339 ''Date and Time on the Internet: Timestamps'' specifies ''YYYY-MM-DD'', i.e. a particular subset of the options allowed by ISO 8601.<ref>{{Cite IETF |rfc=3339 |section=5.6 |title=Date and Time on the Internet: Timestamps |sectionname=5.6 Internet Date/Time Format}}</ref>
* [[RFC 5322]] ''Internet Message Format'' specifies ''day month year'' where ''day'' is one or two digits, ''month'' is a three letter month abbreviation, and ''year'' is four digits.<ref>{{Cite IETF |rfc=5322 |section=3.3 |title=Internet Message Format |sectionname=3.3 Date and Time Specification}}</ref>