var today = new Date();
var lastDayOfMonth = new Date(today.getFullYear(), today.getMonth()+1, 0);
let today = new Date();
let lastDayOfMonth = new Date(today.getFullYear(), today.getMonth()+1, 0);
let numberOfDays = lastDayOfMonth.getDate();
let today = new Date();
let lastDayOfMonth = new Date(today.getFullYear(), today.getMonth()+1, 0);
let numberOfDays = lastDayOfMonth.getDate();