The email module's parsedate_tz function now sets the daylight savings
flag to -1 (unknown) since it can't tell from the date whether it should
be set.
patch from Aldo Cortesi
diff --git a/Lib/email/_parseaddr.py b/Lib/email/_parseaddr.py
index 109ff5f..5821ddf 100644
--- a/Lib/email/_parseaddr.py
+++ b/Lib/email/_parseaddr.py
@@ -124,7 +124,8 @@
else:
tzsign = 1
tzoffset = tzsign * ( (tzoffset//100)*3600 + (tzoffset % 100)*60)
- return yy, mm, dd, thh, tmm, tss, 0, 1, 0, tzoffset
+ # Daylight Saving Time flag is set to -1, since DST is unknown.
+ return yy, mm, dd, thh, tmm, tss, 0, 1, -1, tzoffset
def parsedate(data):