arr30 = [4, 6, 9, 11];
                for (var i = 1; i <= 31; i++) {
                    for (var j = arr31.length - 1; j >= 0; j--) {
                        datas.push([year + '-' + arr31[j] + '-' + i, Math.floor(Math.random() * 1000)]);
                    }
                }
                for (var i = 1; i <= 30; i++) {
                    for (var j = arr30.length - 1; j >= 0; j--) {
                        datas.push([year + '-' + arr30[j] + '-' + i, Math.floor(Math.random() * 1000)]);
           