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• The International Organization for Standardization (ISO) Calendar

  The Banker’s Almanac and Register published calendars in the late 1800s formatted as stacks of weeks similar to Seah’s candybar calendars and the format used by Reingold & Dershowitz. This format is illustrated in the chapter on the ISO Calendar. In their book, Reingold & Dershowitz point out that their only reference is for the ISO Standard ISO 8601:2000(E).

• Drawing Astrolabes: Dividing the Ecliptic

  

• Drawing Astrolabes: The Plate Grid

  The plate grid of an astrolabe is the stereographic projection of the celestial sphere through the south celestial pole onto the plane of the equator. Quoting Morrison:

• Suggested Bibliography
  • Reingold, Edward M. Calendrical Calculations: The Ultimate Edition. 4 edition. Cambridge ; New York: Cambridge University Press, 2018.
• Concept