Event Timestamps

Learn how Terminal49 stores transport event timestamps in UTC and how to convert them to local time using the matching IANA timezone field.

Through the typical container lifecycle, events occur across multiple timezones. Wherever you see a timestamp for a transport event, there should be a corresponding IANA timezone.

Event timestamps are stored and returned in UTC. If you wish to present them in the local time you need to convert that UTC timestamp using the corresponding timezone.

Example

If you receive a container model with the attributes

  'pod_arrived_at': '2022-12-22T07:00:00Z',
  'pod_timezone': 'America/Los_Angeles',

then the local time of the pod_arrived_at timestamp would be 2022-12-21T23:00:00 PST -08:00

When the corresponding timezone is null

When an event occurs and Terminal49 cannot determine the location (and therefore the timezone), the system cannot store the event in true UTC.

In this scenario, Terminal49 takes the timestamp as given from the source and parses it in UTC.

Example

  'pod_arrived_at': '2022-12-22T07:00:00Z',
  'pod_timezone': null,

then the local time of the pod_arrived_at timestamp would be 2022-12-22T07:00:00 and the timezone is unknown. (Assuming the source was returning localized timestamps)

System timestamps

Timestamps representing changes within the Terminal49 system (e.g. created_at, updated_at, terminal_checked_at) are stored and represented in UTC and do not have a TimeZone.