Computing Phases of the Moon

Version 1.1.0 (12.8 KB) by David Eagle
A MATLAB Script for Computing Phases of the Moon
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Updated 27 Jan 2025

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This MATLAB script uses Brent's one-dimensional extrema algorithm to determine the calendar date and UTC time of phases of the Moon.
phases of the Moon
===============
please input the initial calendar date
(1 <= month <= 12, 1 <= day <= 31, year = all digits!)
? 1,1,2025
please input the simulation period (days)
? 120
new moon
--------------
calendar date 29-Jan-2025
UTC time 12:36:24
illumination 0.00 percent
first quarter
---------------
calendar date 05-Feb-2025
UTC time 08:02:42
illumination 50.00 percent
full moon
------------
calendar date 12-Feb-2025
UTC time 13:53:44
illumination 100.00 percent
last quarter
---------------
calendar date 20-Feb-2025
UTC time 17:33:08
illumination 50.00 percent

Cite As

David Eagle (2025). Computing Phases of the Moon (https://www.mathworks.com/matlabcentral/fileexchange/70991-computing-phases-of-the-moon), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2024b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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Version Published Release Notes
1.1.0

Updated several algorithms, user inputs and script output.
1.0.0