diff --git a/pywb/utils/timeutils.py b/pywb/utils/timeutils.py
index c09e8d27..0dcc7e22 100644
--- a/pywb/utils/timeutils.py
+++ b/pywb/utils/timeutils.py
@@ -244,6 +244,7 @@ def timestamp_to_sec(string):
     >>> timestamp_to_sec('20131226095010')
     1388051410
 
+    # rounds to end of 2014
     >>> timestamp_to_sec('2014')
     1420070399
     """
@@ -251,6 +252,18 @@ def timestamp_to_sec(string):
     return calendar.timegm(timestamp_to_datetime(string).utctimetuple())
 
 
+def sec_to_timestamp(secs):
+    """
+    >>> sec_to_timestamp(1388051410)
+    '20131226095010'
+
+    >>> sec_to_timestamp(1420070399)
+    '20141231235959'
+    """
+
+    return datetime_to_timestamp(datetime.datetime.utcfromtimestamp(secs))
+
+
 def timestamp_to_http_date(string):
     """
     >>> timestamp_to_http_date('20131226095000')