A custom Date formatter to format dates coming from Server in Moshi Way. An alternative to GSON builder .setDateFormat method as there is no resembling method in Moshi we need to create Adapter for this.

CustomDateAdapter.kt

// Custom Type Adapters for Moshi
val userMoshi = Moshi.Builder().add(CustomDateAdapter()).add(T).build()

//add Moshi builder in Converter Facrory
 val retrofit = Retrofit.Builder()
                .baseUrl("https://dl.dropboxusercontent.com/")
                .addConverterFactory(MoshiConverterFactory.create(userMoshi))
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .build()

// Custom Date formatter for call the date string coming from server in single date format to Date object.

class CustomDateAdapter {

    /*
    * Date Formatter for date string matching this 2020-11-06T22:39:00+11:00
    *
    * */
    private val DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ssXXX"


    var dateAdapter: Any = object : Any() {
        val dateFormat: DateFormat

        init {
            dateFormat = SimpleDateFormat(DATE_FORMAT, Locale.getDefault())
            dateFormat.timeZone = TimeZone.getTimeZone("GMT")
        }

        @ToJson
        @Synchronized
        fun dateToJson(d: Date): String {
            return dateFormat.format(d)
        }

        @FromJson
        @Synchronized
        @Throws(ParseException::class)
        fun dateFromJson(s: String): Date {
            return dateFormat.parse(s)
        }
    }
}