diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 1de838d4..9ebc2adb 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -15,6 +15,7 @@ from pandas import DataFrame,Series
 from pytz import timezone as tz,utc
 from django.utils import timezone
 from time import strftime,strptime,mktime,time,daylight
+import arrow
 from django.utils.timezone import get_current_timezone
 thetimezone = get_current_timezone()
 from rowingdata import (
@@ -1012,7 +1013,8 @@ def new_workout_from_df(r,df,
 
     df.rename(columns = columndict,inplace=True)
 
-    starttimeunix = mktime(startdatetime.utctimetuple())
+    #starttimeunix = mktime(startdatetime.utctimetuple())
+    starttimeunix = arrow.get(startdatetime).timestamp
     df[' ElapsedTime (sec)'] = df['TimeStamp (sec)']
 
     df['TimeStamp (sec)'] = df['TimeStamp (sec)']+starttimeunix