diff --git a/asterix-app/src/test/resources/runtimets/queries/comparison/datetime_range.aql b/asterix-app/src/test/resources/runtimets/queries/comparison/datetime_range.aql
new file mode 100644
index 0000000..64ffd8b
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/comparison/datetime_range.aql
@@ -0,0 +1,26 @@
+drop dataverse test if exists;
+create dataverse test;
+use dataverse test;
+
+create type Tweet as closed {
+        id: int32,
+        tweetid: int64,
+        loc: point,
+        time: datetime,
+        text: string
+}
+
+create nodegroup group1 if not exists on nc1, nc2;
+
+create dataset TwitterData(Tweet)
+  partitioned by key id on group1;
+
+load dataset TwitterData 
+using "edu.uci.ics.asterix.external.dataset.adapter.NCFileSystemAdapter"
+(("path"="nc1://data/twitter/smalltweets.txt"),("format"="adm")) pre-sorted;
+write output to nc1:"rttest/comparison_datetime_range.adm";
+
+for $t in dataset('TwitterData')
+where $t.time > datetime("2011-05-15T16:00:00Z") and $t.time < datetime("2011-05-15T21:59:59Z")
+order by $t.id
+return { "id": $t.id }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/comparison/datetime_range.adm b/asterix-app/src/test/resources/runtimets/results/comparison/datetime_range.adm
new file mode 100644
index 0000000..83e5173
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/comparison/datetime_range.adm
@@ -0,0 +1,890 @@
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+{ "id": 2188 }
+{ "id": 2200 }
+{ "id": 2201 }
+{ "id": 2204 }
+{ "id": 2205 }
+{ "id": 2206 }
+{ "id": 2221 }
+{ "id": 2223 }
+{ "id": 2226 }
+{ "id": 2227 }
+{ "id": 2236 }
+{ "id": 2237 }
+{ "id": 2238 }
+{ "id": 2239 }
+{ "id": 2240 }
+{ "id": 2241 }
+{ "id": 2242 }
+{ "id": 2243 }
+{ "id": 2244 }
+{ "id": 2245 }
+{ "id": 2246 }
+{ "id": 2247 }
+{ "id": 2248 }
+{ "id": 2249 }
+{ "id": 2250 }
+{ "id": 2251 }
+{ "id": 2253 }
+{ "id": 2257 }
+{ "id": 2260 }
+{ "id": 2262 }
+{ "id": 2263 }
+{ "id": 2267 }
+{ "id": 2269 }
+{ "id": 2270 }
+{ "id": 2275 }
+{ "id": 2276 }
+{ "id": 2277 }
+{ "id": 2282 }
+{ "id": 2283 }
+{ "id": 2284 }
+{ "id": 2293 }
+{ "id": 2294 }
+{ "id": 2295 }
+{ "id": 2296 }
+{ "id": 2297 }
+{ "id": 2298 }
+{ "id": 2299 }
+{ "id": 2327 }
+{ "id": 2328 }
+{ "id": 2335 }
+{ "id": 2338 }
+{ "id": 2348 }
+{ "id": 2349 }
+{ "id": 2363 }
+{ "id": 2364 }
+{ "id": 2368 }
+{ "id": 2375 }
+{ "id": 2380 }
+{ "id": 2382 }
+{ "id": 2385 }
+{ "id": 2386 }
+{ "id": 2392 }
+{ "id": 2393 }
+{ "id": 2394 }
+{ "id": 2395 }
+{ "id": 2396 }
+{ "id": 2397 }
+{ "id": 2406 }
+{ "id": 2408 }
+{ "id": 2409 }
+{ "id": 2413 }
+{ "id": 2415 }
+{ "id": 2416 }
+{ "id": 2417 }
+{ "id": 2421 }
+{ "id": 2423 }
+{ "id": 2433 }
+{ "id": 2434 }
+{ "id": 2435 }
+{ "id": 2436 }
+{ "id": 2437 }
+{ "id": 2438 }
+{ "id": 2456 }
+{ "id": 2457 }
+{ "id": 2458 }
+{ "id": 2461 }
+{ "id": 2463 }
+{ "id": 2465 }
+{ "id": 2466 }
+{ "id": 2467 }
+{ "id": 2470 }
+{ "id": 2471 }
+{ "id": 2488 }
+{ "id": 2489 }
+{ "id": 2490 }
+{ "id": 2491 }
+{ "id": 2492 }
+{ "id": 2493 }
+{ "id": 2494 }
+{ "id": 2495 }
+{ "id": 2496 }
+{ "id": 2532 }
+{ "id": 2533 }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/ADateTimeAscBinaryComparatorFactory.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/ADateTimeAscBinaryComparatorFactory.java
index 50f4302..b62c21a 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/ADateTimeAscBinaryComparatorFactory.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/ADateTimeAscBinaryComparatorFactory.java
@@ -7,9 +7,6 @@
 public class ADateTimeAscBinaryComparatorFactory implements IBinaryComparatorFactory {
     private static final long serialVersionUID = 1L;
 
-    private AMutableDateTime dt1 = new AMutableDateTime(0, 0, 0, 0, 0, 0, 0, 0, 0);
-    private AMutableDateTime dt2 = new AMutableDateTime(0, 0, 0, 0, 0, 0, 0, 0, 0);
-
     public static final ADateTimeAscBinaryComparatorFactory INSTANCE = new ADateTimeAscBinaryComparatorFactory();
 
     private ADateTimeAscBinaryComparatorFactory() {
@@ -18,6 +15,9 @@
     @Override
     public IBinaryComparator createBinaryComparator() {
         return new IBinaryComparator() {
+        	
+            private AMutableDateTime dt1 = new AMutableDateTime(0, 0, 0, 0, 0, 0, 0, 0, 0);
+            private AMutableDateTime dt2 = new AMutableDateTime(0, 0, 0, 0, 0, 0, 0, 0, 0);
 
             @Override
             public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {