19081909

19081909 is an eight-digit decimal sequence that can serve as both a date notation and a numeric identifier. In common usage, the sequence is interpreted as the date 19 August 1909 when written in the day-month-year format (DDMMYYYY). In this reading, the digits map to day 19, month 08, and year 1909. The same eight digits are less clearly interpreted in other formats, since attempting to parse them as a year-month-day or other common orders often yields invalid or ambiguous results. Because of these format considerations, 19081909 is most typically read as a compact representation of the date 19 August 1909 in contexts that preserve the DDMMYYYY convention.

Beyond dating, 19081909 can function as a numeric key or identifier in databases, catalogs, or file naming schemes. As an eight-digit number, it is equal to 19,081,909 in decimal notation and can be used where a unique, compact numeric label is desired. In archival work or metadata tagging, such sequences sometimes appear as part of a broader system for chronological organization or reference codes.

Historically, there is no single widely recognized milestone universally associated with the exact day of 19 August 1909. The eight-digit form remains mainly a practical convention for recording or indexing dates and, when encountered, is typically interpreted within the surrounding format rules of the dataset or repository in which it appears.

See also: date notation, 1909 in history, 19 August.