How would i make a player wait a 24 hours before they can apply again?

you can do something like this:

local canApply = 1 

--Your Code to do something here
canApply = 0

    If canApply = 0 then
        print("You can only apply 1 time per day")
    wait(86400)
    canApply = 1

Or you could do a method using os.date(Day) Put an IntValue in your script, i called mine Day

I recommend this more than the other

local Day = script.Day
local DayValue = os.date("!*t") ["day"]

if os.date("!*t") ["day"] == Day.Value then
    print("You cant apply twice per day!")
else
        print('SUCCESS')
        --Code
        Day.Value = DayValue
end

Replace the print("SUCCESS") with your code that makes the application work and replace print('You cant apply twice per day!') with the message or whatever you want to show the person that they are not allowed to apply twice per day