murano64

var mas = [];
const MILLIS_PER_DAY = 1000 * 60 * 60 * 24; //один день
const now = new Date();
const ddd = 8 - now.getDay();
var key = [];

for (i = 0; i < ddd; i++) {
const quarter = new Date(now.getTime() + i * MILLIS_PER_DAY);
mas[i] = quarter.getDate() + " " + monthString(quarter.getMonth());
key.push([{'text' : mas[i], "callback_data": i + 1}]);
}

var keyboard = {'inline_keyboard' : key};

sendKeyboard(chat_id, "Выбери дату...", keyboard);