mddyyyy

mddyyyy is a simple numeric date format that represents a date as a seven‑digit number. The format concatenates the month, day, and year, omitting any leading zeros for the month and day. The first digit or two represents the month (1–12), the next two digits represent the day (1–31), followed by a four‑digit year. For example, 6132020 denotes 6 January 2020, and 1012023 denotes 10 December 2023.

Because the format relies on a fixed digit grouping, it is often used in computer systems where a uniform, sortable identifier is needed without date separators. It is popular in legacy systems that generate sequential numbers for records, file names, or transaction IDs, particularly in environments where leading zeros could cause sorting or storage issues.

The format is lexicographically sortable because the year occupies the most significant positions after the month and day. When storing or indexing dates in databases, mddyyyy can be stored as an integer field, simplifying arithmetic comparisons. However, it lacks explicit delimiters which can make human reading less straightforward than more conventional formats like YYYYMMDD or MM-DD-YYYY.

Applications of mddyyyy appear in archival naming schemes, engineered data logs, and industrial product codes where dates are embedded in concise identifiers. While it is not ISO‑8601 compliant, its straightforward numeric nature makes it convenient for simple, deterministic date stamping in constrained or legacy infrastructures.