Converting days to years, months and days | JavaScript

Function

function getFormatedStringFromDays(numberOfDays) {
    var years = Math.floor(numberOfDays / 365);
    var months = Math.floor(numberOfDays % 365 / 30);
    var days = Math.floor(numberOfDays % 365 % 30);

    return [years, months, days].join(':');
}

Usage

const str = getFormatedStringFromDays(400);

Result

1:1:5