Choose the schema structure that is right for your site, not the schema you think appears to be prettiest in a rich snippet. Here's ways to specify a number of seasonal overrides. With this example, the usual return policy is unrestricted, but is proscribed during the next two day ranges: https://prestashop-admin-demo46655.life-wiki.com/846139/new_step_by_step_map_for_prestashop_plugin