YYYYMMDDNNNN

YYYYMMDDNNNN is a generic placeholder string often used in technical documentation and examples to represent a date and a four-digit number. The "YYYYMMDD" portion signifies a date in the format Year-Month-Day, where YYYY represents a four-digit year, MM represents a two-digit month (01-12), and DD represents a two-digit day (01-31). The "NNNN" part typically stands for a four-digit numerical identifier or sequence.

This format is frequently employed to illustrate how data might be structured or to provide sample values in programming tutorials, database schema definitions, or API specifications. For instance, it might appear in a file naming convention, such as YYYYMMDDNNNN.log, suggesting that log files are organized by date and a unique four-digit suffix. It can also be used in examples of unique identifiers or transaction codes. The placeholder nature of YYYYMMDDNNNN allows developers and technical writers to convey a concept without committing to a specific, real-world value, making the examples more universally applicable and easier to understand. Its simplicity and clarity make it a common choice for demonstrating date-based or sequential data patterns.