diff --git a/azure_monitor/CHANGELOG.md b/azure_monitor/CHANGELOG.md
index 8d3bebe..711e594 100644
--- a/azure_monitor/CHANGELOG.md
+++ b/azure_monitor/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+- Change epoch for live metrics
+  ([#115](https://github.com/microsoft/opentelemetry-azure-monitor-python/pull/115))
+
 ## 0.4b.0
 Released 2020-06-29
 
diff --git a/azure_monitor/examples/metrics/observer.py b/azure_monitor/examples/metrics/observer.py
index 52f21ac..66b1c64 100644
--- a/azure_monitor/examples/metrics/observer.py
+++ b/azure_monitor/examples/metrics/observer.py
@@ -48,4 +48,4 @@ def get_ram_usage_callback(observer):
     label_keys=(),
 )
 
-input("Metrics will be printed soon. Press a key to finish...\n")
+input("Press any key to exit...")
diff --git a/azure_monitor/src/azure_monitor/sdk/auto_collection/live_metrics/sender.py b/azure_monitor/src/azure_monitor/sdk/auto_collection/live_metrics/sender.py
index 27f39e3..9872efb 100644
--- a/azure_monitor/src/azure_monitor/sdk/auto_collection/live_metrics/sender.py
+++ b/azure_monitor/src/azure_monitor/sdk/auto_collection/live_metrics/sender.py
@@ -3,7 +3,6 @@
 #
 import json
 import logging
-import time
 
 import requests
 
@@ -42,7 +41,7 @@ def _send_request(self, data: str, request_type: str) -> requests.Response:
                     "Expect": "100-continue",
                     "Content-Type": "application/json; charset=utf-8",
                     utils.LIVE_METRICS_TRANSMISSION_TIME_HEADER: str(
-                        round(time.time()) * 1000
+                        utils.get_time_since_epoch()
                     ),
                 },
             )
diff --git a/azure_monitor/src/azure_monitor/sdk/auto_collection/live_metrics/utils.py b/azure_monitor/src/azure_monitor/sdk/auto_collection/live_metrics/utils.py
index cfba984..5893497 100644
--- a/azure_monitor/src/azure_monitor/sdk/auto_collection/live_metrics/utils.py
+++ b/azure_monitor/src/azure_monitor/sdk/auto_collection/live_metrics/utils.py
@@ -1,6 +1,7 @@
 # Copyright (c) Microsoft Corporation. All rights reserved.
 # Licensed under the MIT License.
 #
+import datetime
 import time
 import uuid
 
@@ -26,3 +27,13 @@ def create_metric_envelope(instrumentation_key: str):
         version=azure_monitor_context.get("ai.internal.sdkVersion"),
     )
     return envelope
+
+
+def get_time_since_epoch():
+    now = datetime.datetime.now()
+    # epoch is defined as 12:00:00 midnight on January 1, 0001 for Microsoft
+    epoch = datetime.datetime(1, 1, 1)
+    delta = (now - epoch).total_seconds()
+    # return the number of 100-nanosecond intervals
+    delta = round(delta * 10000000)
+    return delta