To run a pipeline at a given time, use a timer. Timers understand a cron-like specification for when to run a pipeline.

Note that a pipeline will still schedule normally if changes are checked in. If the pipeline should only run according to the timer's schedule then you should also set a manual approval for the first stage of the pipeline to stop it from automatically scheduling when materials change.

The timer behaves exactly the same way as a manually triggered pipeline. That is, it is the same as clicking on the 'play' button for a pipeline at the given time.

For example, the following would run the pipeline at 10pm on weekdays:

    <pipeline name="nightly">
    <timer>0 0 22 ? * MON-FRI</timer>
    <materials>
        ...
    </materials>
    <stages>
        <stage name="compile">
            <approval type="manual"/>
    ...
    </pipeline>
    

For more information see <timer>