What start and end time to input when business hours are 24/7?

Hello,

Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for the delay and for any inconvenience this issue may have caused you.

The opening hours entity is usually added to the Local Business schema or civic structure. If you are not using either of these, you can choose to leave the fields just as they are. If you do have any one of that schema you can use the filter to modify rich snippets and assign the openingHours value to be mon-sun. For reference, here is a link: https://schema.org/openingHours

/**
 * Filter to change the schema data.
 * Replace $schema_type with schema name like article, review, etc.
 * @param array $entity Snippet Data
 * @return array
 */
add_filter( "rank_math/snippet/rich_snippet_LocalBusiness_entity", function( $entity ) {
 return $entity;
});

I hope that helps. Thank you, and please don’t hesitate to contact us if you need further assistance.