21112013

21112013 is a numeric date string commonly interpreted as 21 November 2013 when used in the day-month-year format (DDMMYYYY). It appears without separators in digital filenames, archival identifiers, and data records, where the lack of punctuation makes interpretation dependent on regional conventions. In day-month-year systems, 21112013 unambiguously encodes the calendar date; in month-day-year systems, the same digits could be read differently if separators are omitted.

In computing and data management, the ISO 8601 standard provides an unambiguous representation as 2013-11-21. When dates are stored or exchanged in mixed formats, ambiguity can arise, which is why explicit formatting is preferred, especially in international contexts. The eight-digit sequence 21112013 also functions as a compact identifier, separate from its calendrical meaning. It can appear as a reference number, a timestamp component, or a label within software, documents, or media libraries.

Contextual significance of the specific date depends on events and records associated with that day, which vary by region and domain. As a standalone string, 21112013 does not denote a universally recognized historical event, but it illustrates how date notation and numeric labeling intersect in digital systems. See also date formatting, DDMMYYYY, and ISO 8601.