PUT Update timeline
Update dates under /api/v1/project/timeline. Send either or both dates in strict YYYY-MM-DD format. See the response tabs for validation failures and the empty-request response.
Update project dates under /api/v1/project/timeline. Send either or both dates as
YYYY-MM-DD. Invalid dates or other date formats return HTTP 400.
The resulting start date must be on or before the finish date; rejected
timeline/resource changes return HTTP 422 without applying the change.
When both dates are omitted, null, or empty, HTTP 204 has no body.
Successful updates return HTTP 200 with status: 201 in the JSON body.
/project/timelineAuthorization
Use the standard /api/v1 headers for this request.
Send the target project_token and any timeline changes inside the JSON body.
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Request Body
application/json
Top-level request body type: object. Send JSON fields shown below.
Optional date in `YYYY-MM-DD` format. Null, empty, or whitespace-only means absent, not a request to clear the stored date.
Optional date in `YYYY-MM-DD` format. Null, empty, or whitespace-only means absent, not a request to clear the stored date.
Response Body
application/jsonSuccessful response confirming updated project dates.
{
"status": 201,
"message": "Dates updated 2026-05-01 - 2026-12-31"
}Both dates are omitted, null, or empty. No response body.
No response body.
application/jsonInvalid date or non-ISO date format.
{
"status": 400,
"message": [
"start_date is not a valid date"
]
}application/jsonMissing or invalid integration authentication headers, or an invalid `project_token`.
{
"errors": [
"Not Authenticated"
]
}application/jsonTimeline or resource update rejected. The change is not applied.
{
"status": 422,
"message": [
"start_date must be on or before end_date"
]
}