craftbukkit/nms-patches/net/minecraft/server/commands/CommandTime.patch

--- a/net/minecraft/server/commands/CommandTime.java
+++ b/net/minecraft/server/commands/CommandTime.java
@@ -9,6 +9,11 @@
 import net.minecraft.network.chat.ChatMessage;
 import net.minecraft.server.level.WorldServer;
 
+// CraftBukkit start
+import org.bukkit.Bukkit;
+import org.bukkit.event.world.TimeSkipEvent;
+// CraftBukkit end
+
 public class CommandTime {
 
     public CommandTime() {}
@@ -52,7 +57,13 @@
         while (iterator.hasNext()) {
             WorldServer worldserver = (WorldServer) iterator.next();
 
-            worldserver.setDayTime((long) i);
+            // CraftBukkit start
+            TimeSkipEvent event = new TimeSkipEvent(worldserver.getWorld(), TimeSkipEvent.SkipReason.COMMAND, i - worldserver.getDayTime());
+            Bukkit.getPluginManager().callEvent(event);
+            if (!event.isCancelled()) {
+                worldserver.setDayTime((long) worldserver.getDayTime() + event.getSkipAmount());
+            }
+            // CraftBukkit end
         }
 
         commandlistenerwrapper.sendSuccess(new ChatMessage("commands.time.set", new Object[]{i}), true);
@@ -65,7 +76,13 @@
         while (iterator.hasNext()) {
             WorldServer worldserver = (WorldServer) iterator.next();
 
-            worldserver.setDayTime(worldserver.getDayTime() + (long) i);
+            // CraftBukkit start
+            TimeSkipEvent event = new TimeSkipEvent(worldserver.getWorld(), TimeSkipEvent.SkipReason.COMMAND, i);
+            Bukkit.getPluginManager().callEvent(event);
+            if (!event.isCancelled()) {
+                worldserver.setDayTime(worldserver.getDayTime() + event.getSkipAmount());
+            }
+            // CraftBukkit end
         }
 
         int j = getDayTime(commandlistenerwrapper.getLevel());