diff --git a/code/game/objects/effects/countdown.dm b/code/game/objects/effects/countdown.dm
index 1c7377bd50a..ab422dda3d1 100644
--- a/code/game/objects/effects/countdown.dm
+++ b/code/game/objects/effects/countdown.dm
@@ -103,6 +103,12 @@
 /obj/effect/countdown/supermatter
 	name = "supermatter damage"
 	color = "#00ff80"
+	pixel_y = 8
+
+/obj/effect/countdown/supermatter/attach(atom/A)
+	. = ..()
+	if(istype(A, /obj/machinery/power/supermatter_crystal/shard))
+		pixel_y = -12
 
 /obj/effect/countdown/supermatter/get_value()
 	var/obj/machinery/power/supermatter_crystal/S = attached_to
diff --git a/code/modules/power/supermatter/supermatter.dm b/code/modules/power/supermatter/supermatter.dm
index c38036e6eab..48f81adc96d 100644
--- a/code/modules/power/supermatter/supermatter.dm
+++ b/code/modules/power/supermatter/supermatter.dm
@@ -177,6 +177,10 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_crystal)
 
 	/// If a sliver of the supermatter has been removed. Almost certainly by a traitor. Lowers the delamination countdown time.
 	var/supermatter_sliver_removed = FALSE
+
+	/// If the SM is decorated with holiday lights
+	var/holiday_lights = FALSE
+
 	/// Cooldown for sending emergency alerts to the common radio channel
 	COOLDOWN_DECLARE(common_radio_cooldown)
 
@@ -212,6 +216,9 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_crystal)
 	AddComponent(/datum/component/supermatter_crystal, CALLBACK(src, PROC_REF(wrench_act_callback)), CALLBACK(src, PROC_REF(consume_callback)))
 	soundloop = new(src, TRUE)
 
+	if(!isnull(check_holidays(FESTIVE_SEASON)))
+		holiday_lights()
+
 	if (!moveable)
 		move_resist = MOVE_FORCE_OVERPOWERING // Avoid being moved by statues or other memes
 
@@ -252,6 +259,9 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_crystal)
 			living_user.electrocute_act(shock_damage = 15, source = src, flags = SHOCK_KNOCKDOWN | SHOCK_NOGLOVES)
 			. += span_notice("It could use a little more Sodium Chloride...")
 
+	if(holiday_lights)
+		. += span_notice("Radiating both festive cheer and actual radiation, it has a dazzling spectacle lights wrapped lovingly around the base transforming it from a potential doomsday device into a cosmic yuletide centerpiece.")
+
 	. += delamination_strategy.examine(src)
 	return .
 
@@ -496,6 +506,13 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_crystal)
 		. += mutable_appearance(icon = icon, icon_state = "[base_icon_state]-psy", layer = FLOAT_LAYER - 1, alpha = psy_coeff * 255)
 	if(delamination_strategy)
 		. += delamination_strategy.overlays(src)
+	if(holiday_lights)
+		if(istype(src, /obj/machinery/power/supermatter_crystal/shard))
+			. += mutable_appearance(icon, "holiday_lights_shard")
+			. += emissive_appearance(icon, "holiday_lights_shard_e", src, alpha = src.alpha)
+		else
+			. += mutable_appearance(icon, "holiday_lights")
+			. += emissive_appearance(icon, "holiday_lights_e", src, alpha = src.alpha)
 	return .
 
 /obj/machinery/power/supermatter_crystal/update_icon(updates)
@@ -1026,6 +1043,29 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_crystal)
 	COOLDOWN_START(src, common_radio_cooldown, SUPERMATTER_COMMON_RADIO_DELAY)
 	return TRUE
 
+/obj/machinery/power/supermatter_crystal/proc/holiday_lights()
+	holiday_lights = TRUE
+	RegisterSignal(src, COMSIG_ATOM_ITEM_INTERACTION, PROC_REF(holiday_item_interaction))
+	update_appearance()
+
+/// Consume the santa hat and add it as an overlay
+/obj/machinery/power/supermatter_crystal/proc/holiday_item_interaction(source, mob/living/user, obj/item/item, list/modifiers)
+	SIGNAL_HANDLER
+	if(istype(item, /obj/item/clothing/head/costume/santa) || istype(item, /obj/item/clothing/head/costume/skyrat/christmas)) // SKYRAT EDIT CHANGE - Loadouts
+		QDEL_NULL(item)
+		RegisterSignal(src, COMSIG_ATOM_EXAMINE, PROC_REF(holiday_hat_examine))
+		if(istype(src, /obj/machinery/power/supermatter_crystal/shard))
+			add_overlay(mutable_appearance(icon, "santa_hat_shard"))
+		else
+			add_overlay(mutable_appearance(icon, "santa_hat"))
+		return COMPONENT_CANCEL_ATTACK_CHAIN
+	return NONE
+
+/// Adds the hat flavor text when examined
+/obj/machinery/power/supermatter_crystal/proc/holiday_hat_examine(atom/source, mob/user, list/examine_list)
+	SIGNAL_HANDLER
+	examine_list += span_info("There's a santa hat placed atop it. How it got there without being dusted is a mystery.")
+
 #undef BIKE
 #undef COIL
 #undef ROD
diff --git a/icons/obj/machines/engine/supermatter.dmi b/icons/obj/machines/engine/supermatter.dmi
index 6db38f80476..12b6aff39f6 100644
Binary files a/icons/obj/machines/engine/supermatter.dmi and b/icons/obj/machines/engine/supermatter.dmi differ