PHP has a function for calculating sunset and sunrise—for Earth


<?php
$sun = date_sun_info(time(), 51.50, -0.127);
var_dump( $sun );
?>
Output
array(9) { ["sunrise"]=> int(1747454585) ["sunset"]=> int(1747511446) ["transit"]=> int(1747483015) ["civil_twilight_begin"]=> int(1747452184) ["civil_twilight_end"]=> int(1747513846) ["nautical_twilight_begin"]=> int(1747448706) ["nautical_twilight_end"]=> int(1747517324) ["astronomical_twilight_begin"]=> int(1747443170) ["astronomical_twilight_end"]=> int(1747522860) }