Some requests that create new data, such as creating a new commit, allow you to provide timezone information when specifying or generating timestamps.
Note that these rules apply only to data passed to the API, not to data returned by the API. Timestamps returned by the API are in UTC time, ISO 8601 format.
To determine timezone information for applicable API calls, we apply these rules in order of priority:
- Explicitly providing an ISO 8601 timestamp with timezone information
- Using the
- Using the last known timezone for the user
- Defaulting to UTC without other timezone information
For API calls that allow for a timestamp to be specified, we use that exact timestamp. These timestamps look something like
An example of this is the API to manage commits. For more information, see "REST API endpoints for Git commits."
It is possible to supply a
Time-Zone header, which defines a timezone according to the list of names from the Olson database.
curl -H "Time-Zone: Europe/Amsterdam" -X POST https://api.github.com/repos/github-linguist/linguist/contents/new_file.md
This means that we generate a timestamp for the moment your API call is made, in the timezone this header defines.
For example, the API to manage contents generates a git commit for each addition or change, and it uses the current time as the timestamp. For more information, see "Repositories." The
Time-Zone header will determine the timezone used for generating that current timestamp.
Time-Zone header is specified and you make an authenticated call to the API, we use the last known timezone for the authenticated user. The last known timezone is updated whenever you browse the GitHub website.
If the steps above don't result in any information, we use UTC as the timezone.