текущий месяц номер

function getMonthNumber(month){
    month = month.toLowerCase();
    let months = {
        "march": 3,
        "april": 4,
        "may": 5,
        "june": 6,
        "july": 7,
        "august": 8,
        "september": 9,
        "october": 10,
        "november": 11,
        "december": 12,
        "january": 1,
        "february": 2
    }
    return months[month];
}
getMonthNumber("january")