The term “2025-1-1” refers to the date format used to represent the first day of the year 2025, which is January 1, 2025. It is written according to the ISO 8601 international standard, which specifies that dates should be written in the order of year, month, and day.
The ISO 8601 standard is important because it provides a consistent way to represent dates and times, which can be especially useful in international communication and data exchange. By using a standard format, it is easier to avoid confusion and ensure that dates are interpreted correctly.