More fixes, I don't know

code/game/gamemodes/dynamic/dynamic.dm

@@ -674,6 +674,14 @@ GLOBAL_VAR_INIT(dynamic_forced_threat_level, -1)
 					return TRUE
 	return FALSE
 
+/datum/game_mode/dynamic/proc/check_age(client/C, age)
+	enemy_minimum_age = age
+	if(get_remaining_days(C) == 0)
+		enemy_minimum_age = initial(enemy_minimum_age)
+		return TRUE // Available in 0 days = available right now = player is old enough to play.
+	enemy_minimum_age = initial(enemy_minimum_age)
+	return FALSE
+
 /datum/game_mode/dynamic/make_antag_chance(mob/living/carbon/human/newPlayer)
 	if (GLOB.dynamic_forced_extended)
 		return

code/game/gamemodes/dynamic/dynamic_rulesets.dm

@@ -199,7 +199,7 @@
 			candidates.Remove(candidate_player)
 			continue
 
-		if(candidate_client.check_age(minimum_required_age) > 0)
+		else if(!mode.check_age(client, minimum_required_age))
 			candidates.Remove(candidate_player)
 			continue
 

code/game/gamemodes/dynamic/dynamic_rulesets_latejoin.dm

@@ -8,7 +8,7 @@
 	for(var/mob/P in candidates)
 		if(!P.client || !P.mind || !P.mind.assigned_role) // Are they connected?
 			candidates.Remove(P)
-		else if (!mode.check_age(P.client, minimum_required_age))
+		else if(!mode.check_age(P.client, minimum_required_age))
 			candidates.Remove(P)
 		else if(P.mind.assigned_role in restricted_roles) // Does their job allow for it?
 			candidates.Remove(P)

code/game/gamemodes/dynamic/ruleset_picking.dm

@@ -63,13 +63,14 @@
 	if (!rule.repeatable)
 		latejoin_rules = remove_from_list(latejoin_rules, rule.type)
 	addtimer(CALLBACK(src, .proc/execute_midround_latejoin_rule, rule), rule.delay)
+	return TRUE
 
 /// Mainly here to facilitate delayed rulesets. All midround/latejoin rulesets are executed with a timered callback to this proc.
 /datum/game_mode/dynamic/proc/execute_midround_latejoin_rule(sent_rule)
 	var/datum/dynamic_ruleset/rule = sent_rule
 	spend_midround_budget(rule.cost)
 	threat_log += "[worldtime2text()]: [rule.ruletype] [rule.name] spent [rule.cost]"
-	rule.pre_execute(current_players[CURRENT_LIVING_PLAYERS].len)
+	rule.pre_execute(GLOB.alive_player_list.len)
 	if (rule.execute())
 		log_game("DYNAMIC: Injected a [rule.ruletype == "latejoin" ? "latejoin" : "midround"] ruleset [rule.name].")
 		if(rule.flags & HIGH_IMPACT_RULESET)
@@ -93,7 +94,7 @@
 /// Fired when an admin cancels the current midround injection.
 /datum/game_mode/dynamic/proc/admin_cancel_midround(mob/user, timer_id)
 	if (midround_injection_timer_id != timer_id || !deltimer(midround_injection_timer_id))
-		to_chat(user, "<span class='notice'>Too late!</span>")
+		to_chat(user, span_notice("Too late!"))
 		return
 
 	log_admin("[key_name(user)] cancelled the next midround injection.")
@@ -104,7 +105,7 @@
 /// Fired when an admin requests a different midround injection.
 /datum/game_mode/dynamic/proc/admin_different_midround(mob/user, timer_id)
 	if (midround_injection_timer_id != timer_id || !deltimer(midround_injection_timer_id))
-		to_chat(user, "<span class='notice'>Too late!</span>")
+		to_chat(user, span_notice("Too late!"))
 		return
 
 	midround_injection_timer_id = null