Perpetual calendar

A perpetual calendar is a calendar which can be used, theoretically, forever. This silver example was made in Germany in the 18th century.

The calendar is composed of three leaves, the main leaf pivoting around the centre. This side gives the date, against the days of the week, which has its astrological symbol to the left. It is also marked 'PERPETUUM/ CALENDARIUM'.

All the information this pocket instrument could give would have been of interest in a more religious, agricultural society. Today, this type of information is often found in pocket diaries.

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Online ID:	000-190-001-030-C
Image Rights Holder:	National Museums Scotland
Project:	0098: National Museums Scotland Project description \| View all records in project
Ref:	National Museums Scotland T.1926.70
Date:	18th century
Material:	Silver. Inscription: Zodiacal signs; principal Saints' days
Dimensions:	2.38" D
What:	Calendar, perpetual
Subject:	20. TIME MEASUREMENT (Departmental Classification)
Who:
Where:	Germany
Event:
Description:	Silver perpetual calendar composed of three leaves, Germany, 18th century
References:	For the calendar and its importance, see Duncan, D.E., The calendar: the 5000-year struggle to align the clock and the heavens, and what happened to the missing ten days. London: 1998
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