18451903

18451903 is a contiguous eight-digit number formed by concatenating the four-digit years 1845 and 1903. In textual records, such a string is sometimes used as a shorthand for a time span, most often to encode birth and death years without punctuation. However, without separators the meaning is ambiguous and must be inferred from context.

Possible interpretations include lifespan notation, a temporal interval, or an identifier in a database. As lifespan notation, 18451903 would imply a birth in 1845 and a death in 1903; some biographical catalogs adopt this compact form to save space. As a temporal interval, the string could designate the period from 1845 to 1903, used to describe an era or a project's active years. As an identifier, 18451903 might function as a code in a digital filing system, where the digits encode date components.

In all cases, the lack of separators makes interpretation dependent on surrounding metadata or conventions. To avoid ambiguity, publishers and databases typically render the value as 1845–1903 or store the dates in separate fields.

See also: 1845, 1903, lifespan notation, date range notation, cataloging standards.