diff --git a/SOPE/NGCards/IcalElements.m b/SOPE/NGCards/IcalElements.m
index 467f9377e..153ea2bec 100644
--- a/SOPE/NGCards/IcalElements.m
+++ b/SOPE/NGCards/IcalElements.m
@@ -192,7 +192,7 @@ static inline id GetProperty(NSDictionary *_set, NSString *_name) {
     
     if ([val respondsToSelector:@selector(descriptionWithCalendarFormat:)]) {
       static NSTimeZone *gmt = nil;
-      if (gmt == nil) gmt = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];
+      if (gmt == nil) gmt = [NSTimeZone timeZoneForSecondsFromGMT: 0];
       [val setTimeZone:gmt];
       val = [val descriptionWithCalendarFormat:calfmt];
     }
diff --git a/SOPE/NGCards/NSCalendarDate+ICal.m b/SOPE/NGCards/NSCalendarDate+ICal.m
index 4c491d109..d7bed495c 100644
--- a/SOPE/NGCards/NSCalendarDate+ICal.m
+++ b/SOPE/NGCards/NSCalendarDate+ICal.m
@@ -31,7 +31,7 @@
 static NSTimeZone *gmt = nil;
 static inline void _setupGMT(void) {
   if (gmt == nil)
-    gmt = [[NSTimeZone timeZoneWithAbbreviation:@"GMT"] retain];
+    gmt = [[NSTimeZone timeZoneForSecondsFromGMT: 0] retain];
 }
 
 @implementation NSCalendarDate(iCalRepresentation)
diff --git a/SOPE/NGCards/NSString+NGCards.m b/SOPE/NGCards/NSString+NGCards.m
index 0006411c1..3ea618156 100644
--- a/SOPE/NGCards/NSString+NGCards.m
+++ b/SOPE/NGCards/NSString+NGCards.m
@@ -337,7 +337,7 @@
 	  second = 0;
 	}
 
-      utc = [NSTimeZone timeZoneWithAbbreviation: @"GMT"];
+      utc = [NSTimeZone timeZoneForSecondsFromGMT: 0];
       date = [NSCalendarDate dateWithYear: year month: month 
                              day: day hour: hour minute: minute 
                              second: second
diff --git a/SOPE/NGCards/iCalFreeBusy.m b/SOPE/NGCards/iCalFreeBusy.m
index 74b25a2c1..913e0cb78 100644
--- a/SOPE/NGCards/iCalFreeBusy.m
+++ b/SOPE/NGCards/iCalFreeBusy.m
@@ -107,7 +107,7 @@
   NSCalendarDate *utcStart, *utcEnd;
   NSTimeZone *uTZ;
 
-  uTZ = [NSTimeZone timeZoneWithAbbreviation: @"GMT"];
+  uTZ = [NSTimeZone timeZoneForSecondsFromGMT: 0];
   utcStart = [start copy];
   utcEnd = [end copy];
   [utcStart setTimeZone: uTZ];
diff --git a/SoObjects/Appointments/MSExchangeFreeBusySOAPRequest.m b/SoObjects/Appointments/MSExchangeFreeBusySOAPRequest.m
index 8e53215bc..32eddc865 100644
--- a/SoObjects/Appointments/MSExchangeFreeBusySOAPRequest.m
+++ b/SoObjects/Appointments/MSExchangeFreeBusySOAPRequest.m
@@ -40,7 +40,7 @@
   if ((self = [super init]))
     {
       address = nil;
-      timeZone = [NSTimeZone timeZoneWithAbbreviation: @"GMT"];
+      timeZone = [NSTimeZone timeZoneForSecondsFromGMT: 0];
       [timeZone retain];
       startDate = nil;
       endDate = nil;
diff --git a/UI/MainUI/SOGoRootPage.m b/UI/MainUI/SOGoRootPage.m
index 8ac49db3a..95660794c 100644
--- a/UI/MainUI/SOGoRootPage.m
+++ b/UI/MainUI/SOGoRootPage.m
@@ -109,7 +109,7 @@
 
   appName = [[context request] applicationName];
   date = [NSCalendarDate calendarDate];
-  [date setTimeZone: [NSTimeZone timeZoneWithAbbreviation: @"GMT"]];
+  [date setTimeZone: [NSTimeZone timeZoneForSecondsFromGMT: 0]];
   if (username)
     {
       // Cookie expires in one month
@@ -148,7 +148,7 @@
   if (cookieReset)
     {
       date = [NSCalendarDate calendarDate];
-      [date setTimeZone: [NSTimeZone timeZoneWithAbbreviation: @"GMT"]];
+      [date setTimeZone: [NSTimeZone timeZoneForSecondsFromGMT: 0]];
       [locationCookie setExpires: [date yesterday]];
     }
 
diff --git a/UI/MainUI/SOGoSAML2Actions.m b/UI/MainUI/SOGoSAML2Actions.m
index eb7a01d2f..1d4eb1e33 100644
--- a/UI/MainUI/SOGoSAML2Actions.m
+++ b/UI/MainUI/SOGoSAML2Actions.m
@@ -94,7 +94,7 @@
   cookie = nil;
   
   date = [NSCalendarDate calendarDate];
-  [date setTimeZone: [NSTimeZone timeZoneWithAbbreviation: @"GMT"]];
+  [date setTimeZone: [NSTimeZone timeZoneForSecondsFromGMT: 0]];
 
   // We cleanup the memecached/database session cache. We do this before
   // invoking _logoutCookieWithDate: in order to obtain its value.
@@ -147,7 +147,7 @@
   appName = [rq applicationName];
   [locationCookie setPath: [NSString stringWithFormat: @"/%@/", appName]];
   date = [NSCalendarDate calendarDate];
-  [date setTimeZone: [NSTimeZone timeZoneWithAbbreviation: @"GMT"]];
+  [date setTimeZone: [NSTimeZone timeZoneForSecondsFromGMT: 0]];
   [locationCookie setExpires: [date yesterday]];
 
   return locationCookie;
diff --git a/UI/MainUI/SOGoUserHomePage.m b/UI/MainUI/SOGoUserHomePage.m
index a015e5a63..1f341fec9 100644
--- a/UI/MainUI/SOGoUserHomePage.m
+++ b/UI/MainUI/SOGoUserHomePage.m
@@ -509,7 +509,7 @@
   response = [self redirectToLocation: [self _logoutRedirectURL]];
 
   date = [NSCalendarDate calendarDate];
-  [date setTimeZone: [NSTimeZone timeZoneWithAbbreviation: @"GMT"]];
+  [date setTimeZone: [NSTimeZone timeZoneForSecondsFromGMT: 0]];
 
   // We cleanup the memecached/database session cache. We do this before
   // invoking _logoutCookieWithDate: in order to obtain its value.