function getDayName(dateString) {
    let dayName;
    let days = {
        Sun: "Sunday",
        Mon: "Monday",
        Tue: "Tuesday",
        Wed: "Wednesday",
        Thu: "Thursday",
        Fri: "Friday",
        Sat: "Saturday"
        
    }
    let day  = new Date(dateString)
    let arr = day.toString().split(' ')
    let dayshort = arr[0]
    dayName = days[dayshort]
    
    
    return dayName;
}