diff --git a/src/pyj/date.pyj b/src/pyj/date.pyj
index ec7727a829..279ac8d782 100644
--- a/src/pyj/date.pyj
+++ b/src/pyj/date.pyj
@@ -76,13 +76,17 @@ def fd_format_timezone(dt, ampm, t, as_utc):
 def get_ampm_text(which):
     ans = get_ampm_text[which]
     if not ans:
-        d = Date()
-        if which is 'am':
-            d.setHours(1, 0, 0, 0)
-        else:
-            d.setHours(13, 0, 0, 0)
-        x = window.Intl.DateTimeFormat('default', { 'hour': 'numeric', 'hour12': True }).format(d)
-        ans = get_ampm_text[which] = x.replace(/\d+/g, '').trim() or which.toUpperCase()
+        try:
+            d = Date()
+            if which is 'am':
+                d.setHours(1, 0, 0, 0)
+            else:
+                d.setHours(13, 0, 0, 0)
+            x = window.Intl.DateTimeFormat('default', { 'hour': 'numeric', 'hour12': True }).format(d)
+            ans = x.replace(/\d+/g, '').trim() or which.toUpperCase()
+        except:
+            ans = which.toUpperCase()
+        get_ampm_text[which] = ans
     return ans