Passing post_time Date Constraint in JSON

I have done this successfully in a regular LiQL call but no matter what I try when doing this with JSON I get an error like this:

An invalid value was passed for the constraint 'post_time' (on the object 'messages'): The value should be a date, but is '2023-10-01T10:04:30-08:00'.

Here is my JSON constraint which is then stringified and the API call is made with JavaScript.

"constraints": [
                                    {
                                        "board.id": boardId,
                                        "depth":0,
                                        "post_time": {
                                            ">=": "2023-10-01T10:04:30-08:00"
                                        }
                                    },
                                    {
                                        "depth":0,
                                        "post_time": {
                                            "<=": "2023-11-15T10:04:30-08:00"
                                        }
                                    }
                                ]

Please Help!