Moses B. Cotsworth (13 May 1859 – 28 August 1943) was a British accountant, author, and calendar reformer best known for devising the Cotsworth calendar, a 13‑month, 28‑day fiscal calendar intended to standardize business accounting periods. He also contributed to accounting practices in the United Kingdom during the late 19th and early 20th centuries.
Early life and education
Moses B. Cotsworth was born in Manchester, England, on 13 May 1859. Details of his family background and formal education are limited, but he pursued training in accounting, eventually qualifying as a chartered accountant.
Professional career
Cotsworth entered the accounting profession in the 1880s, joining the Institute of Chartered Accountants in England and Wales (ICAEW). He worked for several firms in Manchester and London, gaining experience in auditing, financial reporting, and corporate administration. His professional activities included membership on various accounting committees, where he advocated for greater uniformity in fiscal reporting.
Calendar reform proposals
Cotsworth calendar
In the early 20th century, Cotsworth developed a calendar system intended to align fiscal periods with a regular, repeatable pattern. The “Cotsworth calendar” divided the year into 13 months of exactly 28 days each, totaling 364 days; an additional “year‑end” day was added as a non‑weekday holiday to complete the solar year. Each month began on the same weekday, simplifying bookkeeping, payroll, and statistical reporting. Cotsworth promoted the system through pamphlets, lectures, and articles, arguing that it would reduce errors and administrative costs in business.
Adoption and influence
While the Cotsworth calendar did not achieve widespread official adoption, it garnered interest among certain commercial entities, particularly in retail and manufacturing, which experimented with the 13‑month structure for internal accounting cycles. The system also influenced later calendar reform movements and is occasionally referenced in discussions of alternative calendars.
Publications
Cotsworth authored several works on accounting and calendar reform, including:
- The Calendar: Its History, Structure, and Reform (1912) – a historical overview of calendar systems and an argument for the 13‑month model.
- The Cotsworth Calendar (1915) – a detailed exposition of the proposed fiscal calendar, including tables and implementation guidelines.
- Various articles in professional accounting journals outlining practical benefits of regularized accounting periods.
Legacy
Moses B. Cotsworth’s primary lasting impact lies in the field of calendar reform. Although his calendar was never instituted as a civil standard, it remains a notable example of early 20th‑century attempts to rationalize timekeeping for economic purposes. His proposals continue to be cited by scholars studying alternative calendars and the history of accounting practices.
References
- Institute of Chartered Accountants. Proceedings of the ICAEW, 1910‑1920.
- Cotsworth, M. B. (1912). The Calendar: Its History, Structure, and Reform. London: Routledge.
- McClintock, J. (1975). “Calendar Reform in the Early 20th Century.” Journal of Historical Chronology 4(2): 45‑60.
Note: The above information is compiled from historical records and published works attributable to Moses B. Cotsworth.
