You have opened the Process Development perspective in the SAP NetWeaverDeveloper Studio and have expanded your project in Project Explorer view.
You have created a task.
The activation time is the time when the task is activated, that means when the task transitions from its initial status "Inactive" to status "Ready". As long as tasks are inactive, end users are not able to see them except of administrators.
By default a task becomes active upon its creation. You can define a different activation time by defining an offset related to the task creation time or by using an expression to evaluate absolute time of type xsd:dateTime. The task is activated when the activation time is reached.
You have defined new activation time that is different from the default one.