1 files changed, 52 insertions, 55 deletions
diff --git a/libical/zoneinfo/America/Detroit.ics b/libical/zoneinfo/America/Detroit.ics
index b8a94b6790..545c7b8190 100644
--- a/libical/zoneinfo/America/Detroit.ics
+++ b/libical/zoneinfo/America/Detroit.ics
@@ -2,13 +2,13 @@ BEGIN:VCALENDAR
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 BEGIN:VTIMEZONE
-TZID:/softwarestudio.org/Olson_20010831_3/America/Detroit
+TZID:/softwarestudio.org/Olson_20011022_4/America/Detroit
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 END:STANDARD
 BEGIN:DAYLIGHT
@@ -18,77 +18,74 @@ TZNAME:EDT
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 RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=1SU
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