Custom Date Encoding/Decoding

CustomDateCoding.swift

// Custom Date Decoding
jsonDecoder.dateDecodingStrategy = .custom({ (decoder) -> Date in
    let data = try decoder.singleValueContainer().decode(String.self)
    //perform your operation on obtained string
    let disturbance = "01-07-1977"
    let formatter = DateFormatter()
    formatter.dateFormat = "dd-MM-yyyy"
    if data == "First disturbance in force" {
        return formatter.date(from: disturbance) ?? Date()
    } else {
        return Date()
    }
})

//  Custom Date Encoding
jsonEncoder.dateEncodingStrategy = .custom({ (date, encoder) in
    let formatter = DateFormatter()
    formatter.dateFormat = "dd-MM-yyyy"
    let stringData = formatter.string(from: date)
    var container = encoder.singleValueContainer()
    try container.encode(stringData)
})