benecaster_availability_datetimes

Filters the tier-slug-to-datetime map before episode availability rows are written. Return the array — a tier_slug => 'Y-m-d H:i:s' map. Add, remove or re-time any entry.

⚠ The datetimes here are SITE-LOCAL, not UTC. AvailabilityRepository::upsert() converts once on the way into the database, so returning a UTC value shifts every affected episode by the site’s offset, silently and in the wrong direction. This is the one rule to get right in a callback here.

⚠ Follower rows are stripped AFTER this filter runs, deliberately — adding a follower entry here will not survive, because followers are a marketing list with a feed URL rather than a tier. Returning an empty array writes no rows at all rather than restoring defaults.

<?php
add_filter( 'benecaster_availability_datetimes', function ( array $tier_datetimes, int $episode_id, int $show_id ): array {
    // Founding members get everything three days before everyone else.
    if ( isset( $tier_datetimes['gold'] ) ) {
        $tier_datetimes['founding'] = gmdate(
            'Y-m-d H:i:s',
            strtotime( $tier_datetimes['gold'] . ' -3 days' )
        );
    }

    return $tier_datetimes;
}, 10, 3 );