20132015

20132015 is a textual label formed by joining the numerals for the years 2013 and 2015. In practice it is used to denote the time period spanning 2013 through 2015, inclusive, especially in contexts where a compact or machine-readable representation is preferred over a written range such as 2013–2015 or 2013 to 2015.

Because the string lacks punctuation, its exact interpretation depends on context. It is most often read as the inclusive interval from 2013 through 2015, but in some uses it appears simply as a label for a multi-year window without implying specifics about any single year. When precision is required, authors should use 2013–2015 or "from 2013 to 2015".

Typical uses include reporting on long-term projects, summarizing data over several consecutive years, or labeling files, datasets, or archives that cover that period. In government, business, academia, and sports, the 2013–2015 window frequently appears in budgets, performance reports, and historical overviews.

Formatting conventions favor the en dash form 2013–2015 in formal writing; the concatenated form is common in filenames, identifiers, or systems with restricted punctuation. Regardless of form, readers should interpret the label in light of the surrounding text to determine whether the period is meant to be inclusive and three years long.

See also 2013, 2014, 2015, 2013–2015, time period, date range.