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The Reference Shelf : Thirteen-Month Calendar - Julia E. Johnsen

The Reference Shelf

Thirteen-Month Calendar

By: Julia E. Johnsen

Paperback | 17 February 2026

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"The Reference Shelf, Thirteen-Month Calendar" is an in-depth exploration of the early 20th-century movement to overhaul the Gregorian calendar. Compiled by Julia E. Johnsen, this volume serves as a comprehensive resource for understanding the proposed transition to a thirteen-month, or "fixed," calendar system-a topic of intense debate among economists, scientists, and social reformers of the era.

The work provides a structured overview of the arguments for and against calendar simplification, featuring reprints of articles, detailed briefs, and extensive bibliographies. It delves into the practical challenges of the existing calendar, such as its unequal months and shifting days of the week, while presenting the perceived benefits of a standardized system for business accounting and international commerce. The collection highlights the "International Fixed Calendar" proposal and other efforts to bring mathematical consistency to the measurement of time.

As a historical record, this volume captures a unique moment in modern history when global institutions reconsidered the fundamental structure of the year. It remains a valuable reference for those interested in the history of timekeeping, the evolution of social standards, and the history of public policy debate.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you may see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.

This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.

As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

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