From 90f5f5fbea139e8c5abb79c5470616e2a9a8974a Mon Sep 17 00:00:00 2001
From: Jiri Kuchta <jiri.kuchta@firma.seznam.cz>
Date: Wed, 14 Jul 2021 13:00:28 +0200
Subject: [PATCH] ensure BYDAY is present in VTIMEZONEs RRULE (fixes #151)

---
 vobject/icalendar.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vobject/icalendar.py b/vobject/icalendar.py
index a44fffb..e95a638 100644
--- a/vobject/icalendar.py
+++ b/vobject/icalendar.py
@@ -298,7 +298,7 @@ def fromLastWeek(dt):
                 if num is not None:
                     dayString = ";BYDAY=" + str(num) + WEEKDAYS[rule['weekday']]
                 else:
-                    dayString = ""
+                    dayString = ";BYDAY=1"
                 if rule['end'] is not None:
                     if rule['hour'] is None:
                         # all year offset, with no rule