https://github.com/louis-aime/milesian_calendar_ada

Packages in Ada defining the Milesian calendar, conversion from/to Julian day, from/to julian-gregorian, and giving the phase of the mean moon.
https://github.com/louis-aime/milesian_calendar_ada

calendar calendars date-conversion gregorian julian julian-day milesian moon

Last synced: 4 days ago
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Packages in Ada defining the Milesian calendar, conversion from/to Julian day, from/to julian-gregorian, and giving the phase of the mean moon.

• Host: GitHub
• URL: https://github.com/louis-aime/milesian_calendar_ada
• Owner: Louis-Aime
• License: mit
• Created: 2017-08-07T22:09:15.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2019-12-21T10:18:33.000Z (almost 5 years ago)
• Last Synced: 2024-06-19T16:41:31.280Z (5 months ago)
• Topics: calendar, calendars, date-conversion, gregorian, julian, julian-day, milesian, moon
• Language: Ada
• Size: 42 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Milesian_calendar_Ada

Packages in Ada defining the Milesian calendar: conversion from/to Julian day, 

from/to julian and gregorian calendars, 

key figures for each year, phase of the mean moon, date of Easter.

Detailed specifications of package elements are given in .ads files.

# Main programs

## milesian_converter

A line-mode program. Give a date in Julian, Gregorian or Milesian calendar, or give the Julian day,

obtain the same date in all other calendars, and the Moon phase.

Get also the key figures of a year, including the date of Easter.

## computus_test

Test the difference between Butcher's and Delambre's method,

and the "Milesian" method for computing the date of Easter.

# Packages

## Computus_meeus

Compute the date of Easter following Delambre's and Butcher's methods.

For comparison with the method defined in Julian_calendar.

## Scaliger

Define the Julian day, as defined by Joseph Justus Scaliger, 

and define the types and basic operations for date and time computations 

over a time span of 148 centuries.

## Scaliger-Ada_conversion

Convert to/from Julian day and Ada time.

## Cycle_computations

Define the integer division with remainder, and the integer division with "ceiling". 

These routines facilitate calendar computations.

## milesian_environment

Instantiations of IO packages.

## Milesian_calendar

Definition of the Milesian calendar, with respect to Julian day.

## Julian_calendar

Julian and gregorian calendars with respect to Julian Day,

plus the computation of the date of Easter, with a simplified (but exact) method.

## Lunar_phase_computations

Compute lunar age, lunar residue, and shift between solar and lunar time.