PHP

laravel carbon first day of month

$startDate = Carbon::now(); //returns current day
$firstDay = $startDate->firstOfMonth();  

laravel carbon get day name

use CarbonCarbon;

Carbon::now()->format("l") // today's day name. example: Sunday

carbon this month first day

$start = new Carbon('first day of January 2021'); //2021-01-01 00:00:00