schedule
Parameters
value
The time when the task is scheduled to be attempted. For App Engine queues, this is when the task will be attempted or retried. For pull queues, this is the time when the task is available to be leased; if a task is currently leased, this is the time when the current lease expires, that is, the time that the task was leased plus the lease_duration. schedule_time will be truncated to the nearest microsecond.