Add time zone parsing support for 'Z' (UTC indicator)

src/common/datetimefmt.cpp

@@ -1482,6 +1482,14 @@ wxDateTime::ParseFormat(const wxString& date,
                     if ( input == end )
                         return false;
 
+                    if ( *input == wxS('Z') )
+                    {
+                        // Time is in UTC.
+                        ++input;
+                        haveTimeZone = true;
+                        break;
+                    }
+
                     // and then check that it's either plus or minus sign
                     bool minusFound;
                     if ( *input == wxT('-') )

tests/datetime/datetimetest.cpp

@@ -903,6 +903,9 @@ void DateTimeTestCase::TestTimeZoneParse()
         { "13:37+0000", true },
         { "17:37+0400", true },
 
+        // Z as UTC designator.
+        { "13:37Z", true },
+
         // Some invalid ones too.
         { "00:00-1300" }, // Offset out of range.
         { "00:00+1300" }, // Offset out of range.