Change to UTC for dashboard time.

CTestConfig.cmake

@@ -10,7 +10,7 @@
 # See the License for more information.
 #=============================================================================
 set(CTEST_PROJECT_NAME "CMake")
-set(CTEST_NIGHTLY_START_TIME "21:00:00 EDT")
+set(CTEST_NIGHTLY_START_TIME "1:00:00 UTC")
 
 set(CTEST_DROP_METHOD "http")
 set(CTEST_DROP_SITE "www.cdash.org")