19121913

19121913 is an eight-digit numeric string that can encode a date or a date range in certain notations. When read as a calendar date in day-month-year order, 19121913 commonly corresponds to 19 December 1913. In other conventions, such as year-month-day or without separators, the string may be interpreted differently; without context the meaning is ambiguous. It can also be used as a shorthand for the period spanning 1912 to 1913, for example in fiscal years or academic years that cross calendar boundaries.

In archival, library, and data-management practices, such compact date formats are used as identifiers in catalogs, file names, and metadata fields to compress dates or to serve as a unique key for an item. The eight-digit form is particularly useful when a fixed-length numeric label is required and there is a need to distinguish dates within the early 20th century.

Because 19121913 is not itself a widely recognized historical topic, articles about it typically treat the string as a date notation rather than a subject. If a specific event on or near that date is discussed, it is identified by the event name with the date stated explicitly. See also related dates in 1913 and 1912 to place the notation in historical context.