diff --git a/geomagio/Algorithm.py b/geomagio/Algorithm.py
index 1f9ad10ec5c2e729347e329899073b6a30e450f5..7eccd54e4b5007df975d155d1f87125165c4135c 100644
--- a/geomagio/Algorithm.py
+++ b/geomagio/Algorithm.py
@@ -52,3 +52,6 @@ class Algorithm(object):
             list of channels the algorithm will be returning.
         """
         return self._outchannels
+
+    def get_data_time_extent(self, outstart, outend):
+        return (outstart, outend)