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Sets the start date of a task. If start is not provided, any existing start date will be unset. If has_start_time is provided, the start date will be marked as one with a time. If parse has a value of 1, start is parsed as per rtm.time.parse.


Available in versions 2.


This method requires authentication with write permissions.


This method requires a timeline.


The effects of this method can be undone.


api_key (Required) 1 2
Your API application key. See here for more details.
timeline (Required) 1 2
The timeline within which to run a method. See here for more details.
list_id (Required) 1 2
The id of the list to perform an action on.
taskseries_id (Required) 1 2
The id of the task series to perform an action on.
task_id (Required) 1 2
The id of the task to perform an action on.
start 1 2
Start date for a task, in ISO 8601 format. If parse is specified and has a value of 1, start is parsed as per rtm.time.parse. start is parsed in the context of the user's Remember The Milk timezone. New start dates must occur before any existing due date on the task.
has_start_time 1 2
Specifies whether the start date has a start time.
parse 1 2
Specifies whether to parse start as per rtm.time.parse.

Example Response

<list id="387546">
  <taskseries id="648042" created="2015-05-07T10:19:54Z" modified="2015-05-07T10:41:22Z"
             name="Get Coffee" source="api">
    <task id="811467" start="2015-05-09T14:00:00Z" has_start_time="0" added="2015-05-07T10:19:54Z"
         completed="" deleted="" priority="N" postponed="1" estimate=""/>

Error Codes

96 Invalid signature
The passed signature was invalid.
97 Missing signature
The call required signing but no signature was sent.
98 Login failed / Invalid auth token
The login details or auth token passed were invalid.
99 User not logged in / Insufficient permissions
The method requires user authentication but the user was not logged in, or the authenticated method call did not have the required permissions.
100 Invalid API Key
The API key passed was not valid or has expired.
105 Service currently unavailable
The requested service is temporarily unavailable.
114 Invalid SOAP envelope
The SOAP envelope sent in the request could not be parsed.
115 Invalid XML-RPC Method Call
The XML-RPC request document could not be parsed.
120 Method not valid for requested version
The requested method is not compatible with the requested version.
300 Timeline invalid or not provided
No timeline provided / Timeline invalid.
320 list_id invalid or not provided
No list_id provided / list_id invalid.
340 taskseries_id/task_id invalid or not provided
No taskseries_id or task_id provided / taskseries_id or task_id invalid.
3040 List is read-only.
Tried to perform action in read-only list.
4040 Sub-task only editable by Pro accounts
Non-pro account tried to update sub-task.
4080 Cannot have due date before start date
Due dates for tasks must be after start dates.