18221900

18221900 is a compact notation used in historical, bibliographic, and archival contexts to indicate a time interval that runs from the year 1822 to the year 1900. When written with a dash as 1822–1900, it clearly marks a span; the fused form 18221900 is commonly found in cataloging codes, database keys, and shorthand indices where a concise date range is required.

The exact interpretation of 18221900 varies by discipline. In a research bibliography, it may delimit sources produced within the latter half of the 19th century; in museum catalogs it may define a collection curated across that period; in data projects it can specify the temporal window of a dataset.

Historically, the interval covers a period of rapid change: industrialization, urbanization, and the expansion of science and global exchange in many regions. However, because it spans diverse geographies, the events and trends within it are not uniform.

As a notational convention, 18221900 is not a formal historical era; scholars may adjust the bounds to suit their topic, and some discussions may begin earlier or end later.

See also: 1822; 1900; 1822 in history; 1900 in history.