Unlock PMPro Series content at 5:00AM each day

my_pmpros_customize_series_delay.php

<?php

// Copy from below here...

/**
 * Changes startdates that are retrieved for members. Useful for implementing custom
 * content drip schedules when using the PMPro Series Add On.
 *
 * @param string $startdate in a timestamp format.
 * @param int $user_id to get startdate for.
 * @param int $level_id to get startdate for ('0' if not specified)
 * @return string
 */
function my_pmpros_customize_series_delay( $startdate, $user_id, $level_id ) {
	/*
	 * To have posts unlock at 05:00 each morning...
	 */
	$startdate = strtotime( 'today 5:00', $startdate );

	return strval( $startdate );
}
add_filter( 'pmpro_member_startdate', 'my_pmpros_customize_series_delay', 10, 3 );