diff --git a/index.html b/index.html
index 782497d..a937142 100644
--- a/index.html
+++ b/index.html
@@ -832,6 +832,14 @@ var effect = (VANTA.CLOUDS2 || VANTA.CLOUDS)({
                 } else if (ch === 'H' && format.substr(i, 2) === 'HH') {
                     result += pad2(date.getHours());
                     i += 2;
+                } else if (ch === 'h' && format.substr(i, 2) === 'hh') {
+                    var h12 = date.getHours() % 12;
+                    if (h12 === 0) h12 = 12;
+                    result += pad2(h12);
+                    i += 2;
+                } else if (ch === 'a') {
+                    result += date.getHours() < 12 ? 'AM' : 'PM';
+                    i += 1;
                 } else if (ch === 'm' && format.substr(i, 2) === 'mm') {
                     result += pad2(date.getMinutes());
                     i += 2;