NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: The new century began: Jan 1, 2000 or Jan 1, 2001?
From: Paul Hirose
Date: 2024 Feb 16, 12:05 -0800
From: Paul Hirose
Date: 2024 Feb 16, 12:05 -0800
On 2/8/2024 7:06 PM, NavList Community wrote: > ** My spreadsheet uses the Julian calendar for all dates before 15 > October, 1582. You have plenty of company. The JPL Horizons application does the same thing. However, in my Lunar program the Julian / Gregorian selection is manual. The switch to the latter, with its step adjustment and change to the leap year rules, in the name of the Pope, was so fraught with religious overtones that many nations rejected it until the 18th or even 20th centuries. Rather than attempt to handle it automatically, my decision was to make the user responsible for calendar selection. There's also the issue of the first date of the new year. I assume Jan 1. It's up to the user to adjust the year if necessary. The program lets you input the year as a positive number and check the BC box, or enter a negative number. But all output is in the latter format. -- Paul Hirose sofajpl.com
