See me running at: https://au-exomars.github.io/marsclock/
Based on the equations given here: https://www.giss.nasa.gov/tools/mars24/help/algorithm.html
And some practical stuff/checking from: http://marsclock.com
Landing site - Oxia Planum - approx 24W 18N from: https://www.esa.int/Science_Exploration/Human_and_Robotic_Exploration/Exploration/ExoMars/Landing_site