Why is DATA returned from server has a DAteTimeOffset into local zone, even though we use UTC?

[g8sun]

{
  "Gdid": "0:0:1",
  "Id": "entrp.gdid@XXXXXXXXXXXXX::000000000000000000000001",
  "Mnemonic": "EN-XXXXXXXXXXX",
  "Caption": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
  "DataVersion":
    {
      "G_Version": "0:0:1",
      "Utc": "2021-08-25T18:00:24-04:00",   <--------------????????????????
      "Origin": "A",
      "Actor": "id@idp::XXXXXXXXXXXXXXXX",
      "State": "Created"
    },
  "StartUtc": "2021-08-25T18:03:49-04:00", <---------- ???????????
  "Properties": "{\"r\":{}}",
  "LevelConfig": "{\"r\":{\"a\":\"1\",\"b\":\"2\"}}",
  "EffectiveConfig": "{\"r\":{\"a\":\"1\",\"b\":\"2\"}}"
}