diff --git a/src/Calendars/ShiaCalendar.php b/src/Calendars/ShiaCalendar.php
index 98c3824..8b42e97 100644
--- a/src/Calendars/ShiaCalendar.php
+++ b/src/Calendars/ShiaCalendar.php
@@ -86,6 +86,7 @@ public function daysInMonth($year, $month)
             1443 => [29, 30, 30, 29, 29, 30, 29, 30, 30, 29, 30, 29],
             1444 => [30, 30, 29, 30, 29, 29, 30, 29, 30, 29, 30, 29],
             1445 => [30, 30, 30, 29, 30, 29, 29, 30, 29, 30, 29, 29],
+            1446 => [30, 30, 30, 29, 30, 30, 29, 30, 29, 30, 29, 29],
         ];
 
         if ($month < 1 || $month > 12) {
@@ -113,6 +114,7 @@ public function julianDayFirstOfYear($year)
             1443 => 2459436.5,
             1444 => 2459790.5,
             1445 => 2460144.5,
+            1446 => 2460498.5,
         ];
 
         if (isset($julianDays[$year])) {