diff --git a/core/api/src/main/java/org/onosproject/core/HybridLogicalTime.java b/core/api/src/main/java/org/onosproject/core/HybridLogicalTime.java
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+++ b/core/api/src/main/java/org/onosproject/core/HybridLogicalTime.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.core;
+
+import com.google.common.base.MoreObjects;
+
+/**
+ * Time provided by a Hybrid Logical Clock described in
+ * this <a href="http://www.cse.buffalo.edu/tech-reports/2014-04.pdf">paper</a>.
+ */
+public class HybridLogicalTime {
+    private final long logicalTime;
+    private final long logicalCounter;
+
+    public HybridLogicalTime(long logicalTime, long logicalCounter) {
+        this.logicalTime = logicalTime;
+        this.logicalCounter = logicalCounter;
+    }
+
+    /**
+     * Returns the logical time component of a HLT.
+     * @return logical time
+     */
+    public long logicalTime() {
+        return logicalTime;
+    }
+
+    /**
+     * Returns the logical counter component of a HLT.
+     * @return logical counter
+     */
+    public long logicalCounter() {
+        return logicalCounter;
+    }
+
+    /**
+     * Returns the real system time represented by this HLT.
+     * @return real system time
+     */
+    public long time() {
+        return (logicalTime >> 16 << 16) | (logicalCounter << 48 >> 48);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("logicalTime", logicalTime)
+                .add("logicalCounter", logicalCounter)
+                .toString();
+    }
+}