Core/Calendar: Implement different timezone support for ingame calendar

Closes #8390
Closes #29427

(cherry picked from commit b888b1b09f71a8b8b4a9d45c804a1f164fb65ac3)

1 files changed, 12 insertions, 12 deletions

diff --git a/src/common/Utilities/Util.cpp b/src/common/Utilities/Util.cpp
index ac97e724902..d852ed655a0 100644
--- a/src/common/Utilities/Util.cpp
+++ b/src/common/Utilities/Util.cpp
@@ -58,9 +58,20 @@ std::vector<std::string_view> Trinity::Tokenize(std::string_view str, char sep,
 #if (defined(WIN32) || defined(_WIN32) || defined(__WIN32__))
 struct tm* localtime_r(time_t const* time, struct tm *result)
 {
-    localtime_s(result, time);
+    if (localtime_s(result, time) != 0)
+        return nullptr;
     return result;
 }
+struct tm* gmtime_r(time_t const* time, struct tm* result)
+{
+    if (gmtime_s(result, time) != 0)
+        return nullptr;
+    return result;
+}
+time_t timegm(struct tm* tm)
+{
+    return _mkgmtime(tm);
+}
 #endif
 
 tm TimeBreakdown(time_t time)
@@ -70,17 +81,6 @@ tm TimeBreakdown(time_t time)
     return timeLocal;
 }
 
-time_t LocalTimeToUTCTime(time_t time)
-{
-#if (defined(WIN32) || defined(_WIN32) || defined(__WIN32__))
-    return time + _timezone;
-#elif defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
-    return timegm(gmtime(&time));
-#else
-    return time + timezone;
-#endif
-}
-
 time_t GetLocalHourTimestamp(time_t time, uint8 hour, bool onlyAfterTime)
 {
     tm timeLocal = TimeBreakdown(time);