From the docs here (http://druid.io/docs/latest/tutorials/tutorial-batch.html) there is the passage:
If your data does not have a natural sense of time, you can tag each row with the current time. You can also tag all rows with a fixed timestamp, like “2000-01-01T00:00:00.000Z”.
However there is no mention of how to do this, and I cannot find any examples online. Any idea? Thanks