Equinoxes and Solstices

compute the dates of equinoxes and solstices
Updated 4 Jan 2021

EQNSOL computes the date of equinoxes and solstices for the input year. This is based upon the formulas given by Jean Meeus in his "Astronomical Algorithms". The date is computed in Julian Date. This function take in JD2CAL function of "Geodetic Toolbox" by Mike Craymer (ID:15285) to convert Julian Date into gregorian calendar date.

YEAR (default=current Year).
VERBOSE (default=1)
- Y=datenum formatted array.

EQ=EQNSOL(...) will stores dates in Matlab format



All dates and times are referred to GMT without DST
Spring Equinox 21-Mar-2007 00:08:28
Summer Solstice 21-Jun-2007 18:07:12
Autumn Equinox 23-Sep-2007 09:52:05
Winter Solstice 22-Dec-2007 06:08:51

Created by Giuseppe Cardillo

To cite this file, this would be an appropriate format: Cardillo G. (2007) Equinoxes and Solstices: compute the date and time of equinoxes and solstices. http://www.mathworks.com/matlabcentral/fileexchange/17977

Cite As

Giuseppe Cardillo (2024). Equinoxes and Solstices (https://github.com/dnafinder/eqnsol), GitHub. Retrieved .

MATLAB Release Compatibility
Created with R2014b
Compatible with any release
Platform Compatibility
Windows macOS Linux
Find more on Dates and Time in Help Center and MATLAB Answers

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Versions that use the GitHub default branch cannot be downloaded

Version Published Release Notes

inputparser and github link

Changes in description

Changes in help section

Improvement in input error handling

To view or report issues in this GitHub add-on, visit the GitHub Repository.
To view or report issues in this GitHub add-on, visit the GitHub Repository.