19990719

19990719 is a compact date representation that encodes July 19, 1999 in the numeric format YYYYMMDD. It is commonly used in computing and data storage, where the year, month, and day are concatenated without separators to produce sortable, unambiguous keys.

In the calendar, 1999 was not a leap year, making July 19 the 200th day of the year. The date sits in mid-summer in the northern hemisphere and mid-winter in the southern hemisphere. This positioning places it within the middle of the calendar year for many planning and historical reference contexts.

Use in computing and data systems is a primary reason for the format's popularity. 19990719 can serve as a straightforward primary key, a timestamp component in filenames, or a portion of a versioning or archival scheme. Its fixed width and lexicographic sortability make it convenient for sorting, querying, and organizing large datasets without requiring locale-specific parsing.

Limitations and considerations include human readability and ambiguity when presented without context. While unambiguous for machine processing, plain text dates like 19990719 may be harder for users to interpret quickly compared with more verbose formats such as July 19, 1999. Variants with separators (YYYY-MM-DD) are often preferred in human-facing interfaces, though they may be less ideal for compact storage or strict sort order in some systems.

See also: ISO 8601 date representation; YYYYMMDD date format; date encoding in databases.