Function daysInMonth

static/plugins/chart.js/Chart.bundle.js:15577–15584

(year, month)

    }

    function daysInMonth(year, month) {
        if (isNaN(year) || isNaN(month)) {
            return NaN;
        }
        var modMonth = mod(month, 12);
        year += (month - modMonth) / 12;
        return modMonth === 1 ? (isLeapYear(year) ? 29 : 28) : (31 - modMonth % 7 % 2);
    }

    // FORMATTING