String to date, Date to String

Extension.Swift

import Foundation

exntension Date {
    func toString(format: String) -> String {
        let formatter = DateFormatter()
        formatter.calendar = Calendar(identifier: .gregorian)
        formatter.dateFormat = format
        return formatter.string(from: self)
    }
}

extension String {
    func toDate(format: String, locale: Locale? = Locale(identifier: "en_US")) -> Date? {
        let dateFormatter = DateFormatter()
        let calendar = Calendar(identifier: .gregorian)
        dateFormatter.calendar = calendar
        dateFormatter.dateFormat = format
        dateFormatter.locale = locale
        return dateFormatter.date(from: self)
    }
}