The code behind https://estcequecestbientotlaclasseverte.fr
If you don't understand what is the goal of this application... Well - that's absolutely normal.
The main service and probably the most interesting part of this project is:
$estCeQueCEst = new EstCeQueCEst($start, $end);
$estCeQueCEst->bientotLaClasseVerte();