diff --git a/Misc/SAV6.cs b/Misc/SAV6.cs
index f288e7ef1..3ab1931d3 100644
--- a/Misc/SAV6.cs
+++ b/Misc/SAV6.cs
@@ -425,7 +425,7 @@ public int Vivillon
         public uint AdventureStart { get { return BitConverter.ToUInt32(Data, PlayTime + 0x4); } set { BitConverter.GetBytes(value).CopyTo(Data, PlayTime + 0x4); } }
         public int AdventureStartYear { get { return (int)(AdventureStart & 0xFFF); } set { AdventureStart = AdventureStart & 0xFFFFF000 | (uint)value; } }
         public int AdventureStartMonth { get { return (int)(AdventureStart >> 12 & 0xF); } set { AdventureStart = AdventureStart & 0xFFFF0FFF | ((uint)value & 0xF) << 12; } }
-        public int AdventureStartDay { get { return (int)(AdventureStart >> 16 & 0xF); } set { AdventureStart = AdventureStart & 0xFFF0FFFF | ((uint)value & 0xF) << 16; } }
+        public int AdventureStartDay { get { return (int)(AdventureStart >> 16 & 0xF); } set { AdventureStart = AdventureStart & 0xFFE0FFFF | ((uint)value & 0x1F) << 16; } }
         public int PlayedHours{ 
             get { return BitConverter.ToUInt16(Data, PlayTime); } 
             set { BitConverter.GetBytes((ushort)value).CopyTo(Data, PlayTime); }