Hi,
It's already possible to export a CSV when an order is confirmed with the data of the order in the CSV.
For that, you can create a mass action on order with the trigger "after an order is updated", with a filter for the status confirmed, and an action export a CSV file.
However, it's not possible for now to have the CSV file name be dynamic. The CSV file name will always be the same and thus the file will be overwritten if you store it on your website. Alternatively, you can have it sent to you by email.
Having the file name dynamic for the export would require some development.
But all of this has nothing to do with the subject of this thread which was about adding an option to select a trigger time of the day for periodic mass actions.