Core/Calendar: Implement different timezone support for ingame calendar

Closes #8390
Closes #29427

(cherry picked from commit b888b1b09f71a8b8b4a9d45c804a1f164fb65ac3)

1 files changed, 12 insertions, 0 deletions

diff --git a/src/common/Utilities/Hash.h b/src/common/Utilities/Hash.h
index b63201bf07a..18f7442fb44 100644
--- a/src/common/Utilities/Hash.h
+++ b/src/common/Utilities/Hash.h
@@ -19,6 +19,7 @@
 #define TrinityCore_Hash_h__
 
 #include <functional>
+#include <string_view>
 #include <utility>
 
 namespace Trinity
@@ -28,6 +29,17 @@ namespace Trinity
     {
         seed ^= std::hash<T>()(val) + 0x9E3779B9 + (seed << 6) + (seed >> 2);
     }
+
+    inline std::uint32_t HashFnv1a(std::string_view data)
+    {
+        std::uint32_t hash = 0x811C9DC5u;
+        for (char c : data)
+        {
+            hash ^= c;
+            hash *= 0x1000193u;
+        }
+        return hash;
+    }
 }
 
  //! Hash implementation for std::pair to allow using pairs in unordered_set or as key for unordered_map