refine parse_date

1 files changed, 1 insertions, 1 deletions

diff --git a/bottle.py b/bottle.py
index 56a1b77..a590c4c 100755
--- a/bottle.py
+++ b/bottle.py
@@ -2980,7 +2980,7 @@ def parse_date(ims):
     """ Parse rfc1123, rfc850 and asctime timestamps and return UTC epoch. """
     try:
         ts = email.utils.parsedate_tz(ims)
-        return time.mktime(ts[:8] + (0, )) - (ts[9] or 0) - time.timezone
+        return calendar.timegm(ts[:8] + (0, )) - (ts[9] or 0)
     except (TypeError, ValueError, IndexError, OverflowError):
         return None