Holiday System (#3122)

Content.Server/Holiday/Interfaces/IHolidayCelebrate.cs

@@ -0,0 +1,15 @@
+using Robust.Shared.Serialization;
+
+namespace Content.Server.Holiday.Interfaces
+{
+    public interface IHolidayCelebrate : IExposeData
+    {
+        void IExposeData.ExposeData(ObjectSerializer serializer) {}
+
+        /// <summary>
+        ///     This method is called before a round starts.
+        ///     Use it to do any fun festive modifications.
+        /// </summary>
+        void Celebrate(HolidayPrototype holiday);
+    }
+}