+# Set Header = If-Modified-Since: Thu, 01-Jan-123456789 00:00:00 GMT
+# Expect Header = REMOVAL
+# Set Header = If-Modified-Since: Thursday, 01-Jan-123456789 00:00:00 GMT
+# Expect Header = REMOVAL
+# Set Header = If-Modified-Since: Thu, 01-Jan-123456789 00:00:00 GMT
+# Expect Header = REMOVAL
+# Set Header = If-Modified-Since: Thursday Jan 01 00:00:00 123456789 GMT
+# Expect Header = REMOVAL
+#