diff --git a/twoot.py b/twoot.py
index 7f1d186..ecb2148 100755
--- a/twoot.py
+++ b/twoot.py
@@ -893,7 +893,7 @@ def main(argv):
             timestamp = datetime.strptime(time_string, '%b %d, %Y · %I:%M %p %Z')
 
         # Check if time is within acceptable range
-        if not is_time_valid(timestamp):
+        if not is_time_valid(timestamp.timestamp()):
             out_date_cnt += 1
             logging.debug("Tweet outside valid time range, skipping")
             continue