commit 3b9314ca8ad0340f0ac529add1abe8be3b1c1905
Author: David Sorber <david.sorber@gmail.com>
Date:   Wed Jan 23 21:16:28 2019 -0500

    Fix logic bug when calculating time diffs. Version 0.1.3.

diff --git a/software/hbkcd/hbkcd/daemon.py b/software/hbkcd/hbkcd/daemon.py
index e3d2e44..3076b61 100755
--- a/software/hbkcd/hbkcd/daemon.py
+++ b/software/hbkcd/hbkcd/daemon.py
@@ -49,7 +49,7 @@ def datetime_diff(dt_start, dt_end):
     """ Helper function to calculate the elapsed time between to datetime 
     objects and return in a readable "HH::MM:SS" string format.
     """
-    elapsed = dt_end - dt_start
+    elapsed = dt_start - dt_end
     hours, remainder = divmod(elapsed.total_seconds(), 3600)
     minutes, seconds = divmod(remainder, 60)
     elapsed_str = '{:02}:{:02}:{:02}'