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Object Timeline

1957

  • We acquired this object.

2015

2025

  • You found it!

Perpetual Calendar

This is a Perpetual calendar. It is dated early 18th century and we acquired it in 1957. Its medium is brass. It is a part of the Product Design and Decorative Arts department.

This object was donated by Estate of Mrs. Lathrop Colgate Harper.

Its dimensions are

H x diam.: 0.1 × 5.1 cm (1/16 in. × 2 in.)

Cite this object as

Perpetual Calendar; brass; H x diam.: 0.1 × 5.1 cm (1/16 in. × 2 in.); 1957-165-18

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If you would like to cite this object in a Wikipedia article please use the following template:

<ref name=CH>{{cite web |url=https://www-4.collection.cooperhewitt.org/objects/18416847/ |title=Perpetual Calendar |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=29 October 2025 |publisher=Smithsonian Institution}}</ref>