From 75fce31f5345a54082ad241735873c178bf9d785 Mon Sep 17 00:00:00 2001
From: Harald Eilertsen <haraldei@anduin.net>
Date: Sat, 18 Jun 2022 20:27:34 +0200
Subject: Passing null as first arg to strtotime is deprecated.

---
 includes/admin/views/_edit_concert_form.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/includes/admin/views/_edit_concert_form.php b/includes/admin/views/_edit_concert_form.php
index 18ff4d3..1a2e5a6 100644
--- a/includes/admin/views/_edit_concert_form.php
+++ b/includes/admin/views/_edit_concert_form.php
@@ -62,7 +62,7 @@ if ( ! class_exists( 'GiglogAdmin_EditConcertForm' ) ) {
                 . '<label for="venue">Venue:</label>' . $this->get_venue_selector( $c->venue() ) . '<br>'
                 // date has to be formatted else it is not red in the date field of html form
                 . '<label for="cdate">Date:</label>'
-                . '<input type="date" id="cdate" name="cdate" value="' . esc_attr( date( 'Y-m-d', strtotime( $c->cdate() ) ) ) . '"><br>'
+                . '<input type="date" id="cdate" name="cdate" value="' . esc_attr( date( 'Y-m-d', strtotime( $c->cdate() ?? '' ) ) ) . '"><br>'
                 . '<label for="ticket">Tickets:</label>'
                 . '<input type="text" id="ticket" name="ticket" value="' . esc_url( $c->tickets() ) . '"><br>'
                 . '<label for="eventurl">Event link:</label>'
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