php $date1 = date_create("2023-02-01"); $date2 = date_create("2023-03-01"); $date3 = date_diff($date1, $date2); echo $date3->format('%a'); javascript var date1 = new Date("2023-02-01"); var date2 = new Date("2023-03-01"); var date3 = date1.getTime() - date2.getTime(); console.log(Math.abs(date3 / (1000 * 60 * 60 * 24)));