Editorial Type:
Article
Article Type:
Research Article

Calendars and Software

Jon E. Ahlquist Department of Meteorology, The Florida State University, Tallahassee, Florida

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Online Publication:
01 Jan 2000
Print Publication:
01 Jan 2000
DOI:
https://doi.org/10.1175/1520-0477(2000)081<0069:CAS>2.3.CO;2
Page(s):
69–74
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Meteorologists need to be able to manipulate arbitrary dates in the past, present, and future. Here calendar rules for both the Julian (old) and Gregorian (modern) calendars are reviewed. The author describes free software available online to perform calendrical conversions involving (day, month, year), (day of the year, year), and Julian day number for both the Julian and Gregorian calendars.

Corresponding author address: Jon E. Ahlquist, Department of Meteorology, The Florida State University, Tallahassee, FL 32306-4520. E-mail: ahlquist@met.fsu.edu

Meteorologists need to be able to manipulate arbitrary dates in the past, present, and future. Here calendar rules for both the Julian (old) and Gregorian (modern) calendars are reviewed. The author describes free software available online to perform calendrical conversions involving (day, month, year), (day of the year, year), and Julian day number for both the Julian and Gregorian calendars.

Corresponding author address: Jon E. Ahlquist, Department of Meteorology, The Florida State University, Tallahassee, FL 32306-4520. E-mail: ahlquist@met.fsu.edu
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