Create array of dates

array_dates.js

const allDays = [0, 3, 5];

function formatToPush(dt_inicio, dt_final, dia, horas) {

    let start = moment(dt_inicio);
    let end = moment(dt_final);

    let result = [];
    let datas = [];
    let current = start.clone();

    //console.log(current.day(dia).format('YYYY-MM-DD'), current.day(dia).isSame(end))

    if ((current.day(dia).isSameOrAfter(start)) || (current.day(dia).isSameOrAfter(end)) || (current.day(7 + dia).isSameOrBefore(end))) {
        result.push(current.clone());
    }

    result.map(m => {
        horas.map(h => {
            m.set({ hour: h.split(':')[0], minute: h.split(':')[1], second: 0, millisecond: 0 });
            datas.push(m.format('YYYY-MM-DD HH:mm:ss [GMT]ZZ'))
        })
    });

    return datas;
}

let final = [];

for (let i in allDays) {
    final.push(...formatToPush('2021-12-01', '2021-12-10', allDays[i], ["10:00", "16:00", "22:30"]))
}

console.log(final)
//[
//     '2021-12-05 10:00:00 GMT-0300',
//     '2021-12-05 16:00:00 GMT-0300',
//     '2021-12-05 22:30:00 GMT-0300',
//     '2021-12-01 10:00:00 GMT-0300',
//     '2021-12-01 16:00:00 GMT-0300',
//     '2021-12-01 22:30:00 GMT-0300',
//     '2021-12-03 10:00:00 GMT-0300',
//     '2021-12-03 16:00:00 GMT-0300',
//     '2021-12-03 22:30:00 GMT-0300'
// ]