1 files changed, 20 insertions, 0 deletions
diff --git a/ext/date/tests/bug63391.phpt b/ext/date/tests/bug63391.phpt
new file mode 100644
index 000000000..a29d25e73
--- /dev/null
+++ b/ext/date/tests/bug63391.phpt
@@ -0,0 +1,20 @@
+--TEST--
+Test for #63391 (Incorrect/inconsistent day of week prior to the year 1600)
+--FILE--
+<?php
+ini_set('date.timezone', 'UTC');
+
+print "Date         PHP\n";
+print "----------   ---\n";
+$dates = array('1599-12-30', '1599-12-31', '1600-01-01', '1600-01-02');
+foreach ($dates as $date) {
+	echo date_create($date)->format('Y-m-d   D'), "\n";
+}
+?>
+--EXPECT--
+Date         PHP
+----------   ---
+1599-12-30   Thu
+1599-12-31   Fri
+1600-01-01   Sat
+1600-01-02   Sun