Labels not updating, how do I fix it?

I've created a script that will auto update the labels of a GUI. I've tried both Script and LocalScript, yet nothing is working for me. There are no errors whatsoever, which makes me think that the script isn't even running at all.

Here is my code if you need it:

--[[

-- INFO --

Weather

0 = Normal
1 = Rain
2 = Thunderstorm

]]

-- Settings --

local songs = { -- All songs must be 60 seconds or longer (even 59.9999 is not recommended)
	-- Normal
	{Song = script.Day, Weather = 0, TimeOfDay = {"Dawn","Noon"}},
	{Song = script.Sunset, Weather = 0, TimeOfDay = {"Dusk"}},
	{Song = script.Night, Weather = 0, TimeOfDay = {"Night"}},
	
	-- Rain
	{Song = script.MorningRain, Weather = 1, TimeOfDay = {"Dawn"}},
	{Song = script.Rain, Weather = 1, TimeOfDay = {"Noon","Evening"}},
	{Song = script.NightRain, Weather = 1, TimeOfDay = {"Night"}},
	
	-- Thunder
	{Song = script.Thunderstorm, Weather = 2, TimeOfDay = {"Dawn","Noon","Dusk","Night"}}
}

























-- Script --



game:GetService("RunService").Heartbeat:Wait()



local RS = game:GetService("RunService")

local dayLabel = script.Parent.Day
local timeOfDayLabel = script.Parent.TimeOfDay

local music = script.Parent.Music

RS.Stepped:connect(function()
	local timeOfDay = "Night"
	local weatherString = ""
	
	if (game.Lighting.ClockTime > -1) and (game.Lighting.ClockTime < 6) then
		timeOfDay = "Night"
	elseif (game.Lighting.ClockTime < 12) then
		timeOfDay = "Dawn"
	elseif (game.Lighting.ClockTime < 18) then
		timeOfDay = "Noon"
	elseif (game.Lighting.ClockTime < 24) then
		timeOfDay = "Dusk"
	end
	
	if game.Lighting.Weather.Value == 1 then
		weatherString = " (Rain)"
	elseif game.Lighting.Weather.Value == 2 then
		weatherString = " (Thunder)"
	end
	
	dayLabel = "Day "..game.Lighting.Day.Value
	timeOfDayLabel = timeOfDay..weatherString
	
	for _,i in pairs(songs)do
		if (i.Weather == game.Lighting.Weather.Value) then
			local found = false
			for _,v in pairs(i.TimeOfDay)do
				if v == game.Lighting.TimeOfDay.Value then
					found = true
					music.SoundId = i.Song.SoundId
				end
			end
			if found == true then break end
		end
	end
	
	if music.IsPlaying == false then
		music:Play()
	end
end)

Thanks!