app/models/ZonedDateTimeEncoder.scala (7 lines of code) (raw):
package models
import io.circe.{Decoder, Encoder}
import java.time.ZonedDateTime
object ZonedDateTimeEncoder {
implicit val zdtEncoder:Encoder[ZonedDateTime] = Encoder.encodeZonedDateTime
implicit val zdtDecoder:Decoder[ZonedDateTime] = Decoder.decodeZonedDateTime
}