The date given for an artwork signifies the date of completion.
When the artist dated a work, this date is used except for cases where research points to a different date. Lichtenstein sometimes signed an artwork years after it was created and the date of creation was misremembered. He may also have finished a work in December of a year, then signed it in January of the following year. When in doubt, we erred toward using the earlier date.
When the artist did not date a work, the catalogue entry reflects the date listed in a primary or published source, with the source cited in Remarks.
When works are dated based on the dates of related preparatory or final works or works of similar subject matter and technique, circa "c." is added.
Date ranges are typically preceded by "c." to indicate that a work was likely completed within or just outside the range. Ranges given without circa are written as such on the work by the artist. Years are separated by a slash when the artist revisited a project years apart.
Dates written on a work by a registrar or earlier cataloguer are ignored if they differ from the catalogue raisonné team's research.
See also: 3. RESEARCH AND RESOURCES
Dates of Editioned Works
For editioned works dates are given as such:
First, the date of conception, based on the date of a prototype, the last known maquette or preparatory work; second, in parentheses, the date(s) when fabrication was completed.
When casts or pieces were completed over the course of multiple years, the fabrication date is given as a range. A "c." before the conception date or fabrication date(s) indicates uncertainty.