20132020

20132020 is a nonstandard designation formed by joining the numerals of the calendar years 2013 and 2020. It is not a formal term with a unified definition, but it is sometimes used in documents, datasets, or project names to denote a time span that begins in 2013 and ends in 2020. The lack of a dash or other separator can create ambiguity, so writers typically provide an explicit explanation when using the label.

In practice, 20132020 may label datasets collected during those years, years of a program's implementation, or historical summaries that cover the period. It also appears in organizational planning, publishing campaigns, and archival tagging where a compact reference to the period is convenient.

Interpretation can vary: some contexts treat 20132020 as a continuous span from the start of 2013 to the end of 2020, while others use it to indicate a focus on outcomes in or stemming from that window. Because it is nonstandard, the designation relies on accompanying documentation for precision.

Notation alternatives include the conventional 2013–2020 or 2013-2020, which are widely understood to denote a range. When possible, standard range notation is preferred in formal writing to avoid confusion.