How do time zones work when selecting a departure or arrival time?

When selecting a departure or arrival time, it must be given in ISO 8601 format. For example:

2022-07-12T07:00:00Z (representing UTC)

To use a different time zone, this should be added on to the end of the departure or arrival, like below:

2022-07-12T07:00:00-05:00 (representing New York on Standard Time: UTC-05:00)