19102009

19102009 is a numeric string that can denote a calendar date when interpreted in day-month-year order, corresponding to 19 October 2009. It is also used as a compact timestamp in digital records when separators are omitted, particularly in systems that adopt the ddmmyyyy convention for concise sorting.

When interpreted in ISO 8601 form, the same day is written as 2009-10-19. In the United States, date representations typically use MM/DD/YYYY, which would not render 19102009 unambiguously. In practice, the eight-digit sequence is most unambiguous when rendered with separators such as 19-10-2009 or 2009-10-19. As a data key, it can appear in file naming, archival identifiers, or database keys to encode the date of creation or an event.

There is no single globally recognized event universally associated with the sequence 19102009; any significance is tied to a particular document, facility, or dataset that uses it as a date marker. Its relevance is therefore contextual rather than universal.

Related topics include date formats, DDMMYYYY, ISO 8601, and the YYYY-MM-DD notation used for international interoperability.