This is a handy way to give format to your dates in swift

DateFormatSelector.swift

enum DateFormatSelector: String {
    /// AM or PM only
    case a = "a"
    case MMMM = "MMMM"
    case yyyy = "yyyy"
    case Hmm = "H:mm"
    /// The 24-hour hour padding with a zero if there is only 1 digit.
    case HHmm = "HH:mm"
    /// The 12-hour hour padding with a zero if there is only 1 digit
    case hhmm = "hh:mm"
    case hmma = "h:mm a"
    case MMddyyyy = "MM/dd/yyyy"
    case yyyyMMdd = "yyyy-MM-dd"
    case MMMddyyyy = "MMM dd, yyyy"
    case MMddyyyyHHmm = "MM/dd/YYYY HH:mm"
    case yyyyMMddhmma = "yyyy-MM-dd h:mm a"
    case EMMMdyyyy = "E, MMM d yyyy"
    case EEEEMMMMddyyyy = " EEEE, MMMM dd, yyyy'"
    case yyyyMMddTHHmmssSSSZ = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
}

extension String {
    /// Convert a String to Date
    /// - Parameter format: Format of the string date to be converted
    /// - Returns: Date type with the date of the string
    func toDate(format: DateFormatSelector) -> Date {
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = format.rawValue
        return dateFormatter.date(from: self) ?? .now
    }

    /// Convert a String in a certain date format to another
    /// string in another format
    /// - Parameters:
    ///   - fromFormat: Date format origin
    ///   - toFormat: Date format destination
    /// - Returns: String with the desired format
    func toDateString(fromFormat: DateFormatSelector, toFormat: DateFormatSelector) -> String {
        let date: Date = self.toDate(format: fromFormat)
        return date.toString(format: toFormat)
    }
}

extension Date {
    /// Convert a Date to a string in a desired format
    /// - Parameter format: Format destination
    /// - Returns: String with the date in the desired format
    func toString(format: DateFormatSelector) -> String {
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = format.rawValue
        return dateFormatter.string(from: self)
    }
}