GiveWP time email tag

give_time_email_tag.php

<?php

function give_time_email_tag( $email_tags ) {
	// Adds an email tag called {time} to output the donation time.
	$email_tags[] = array(
		'tag'     => 'time', // The tag name.
		'desc'    => __( 'This outputs the donation time', 'give' ), // For admins.
		'func'    => 'render_time_email_tag', // Callback to function below.
		'context' => 'donation',
	);
	return $email_tags;
}
add_filter( 'give_email_tags', 'give_time_email_tag', 999, 1 );

function render_time_email_tag( $tag_args ) {
	$date = get_post_field( 'post_date', $tag_args['payment_id'] );

	if ( empty( $date ) ) {
		return '';
	}

	try {
		$dateTime = new DateTime( $date );
		// Change the format as needed. Output: 15:31:00
		$output = $dateTime->format( 'H:i:s' );
	} catch ( Exception $e ) {
		$output = '';
	}

	return apply_filters( 'give_email_tag_give_time', $output, $tag_args );
}