DateFormat
is an option that determines the date formatting that is used for DateObject display and for interpretation in Interpreter.
Details

- DateFormat is set to $DateStringFormat by default.
- DateFormat can be set to any format specification supported by DateString.
Examples
Wolfram Research (2014), DateFormat, Wolfram Language function, https://reference.wolfram.com/language/ref/DateFormat.html.
Text
Wolfram Research (2014), DateFormat, Wolfram Language function, https://reference.wolfram.com/language/ref/DateFormat.html.
BibTeX
BibLaTeX
CMS
Wolfram Language. 2014. "DateFormat." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/DateFormat.html.
APA
Wolfram Language. (2014). DateFormat. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/DateFormat.html