LÖVE

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local time = 0

love.update = function(dt)
	time = time + dt -- counted in miliseconds. 1 = 1 real seconds
end

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print(time / 60) --floor it or ceil?

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print((time / 60) / 60)

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local t_start = os.clock()

for i = 1, 10000 do end -- "simulate" the game

local t_end = os.clock()

local total = t_end - t_start

print(string.format("%.6f Sec",total))  -- `.6f` means 6 digits after the decimal
print(math.floor(total+.5))     -- Or we round the number

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local seconds = 59 -- We want it to be worth 1 minutes
local minutes = math.floor(seconds/60+.01666666666666672) -- because 59/60=0.98333... S/60+(1-59/60)

-- Note: But it can be redundant to search for the right value
-- for and it will only work for a value less than 60
-- so you can also use the modulo operator with a condition

minutes = math.floor(seconds / 60)
if seconds % 60 == 59 then
  minutes = minutes + 1
end

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function getTimeFromSec(seconds)
    local hours = math.floor(seconds/3600)
    seconds = seconds-(hours*3600)
    local minutes = math.floor(seconds/60)
    seconds = seconds-(minutes*60)
    return string.format("%d:%02d:%02d", hours, minutes, seconds)    -- Displays as follows: H:M:S    -- %02d is used to display "00" if empty or "01" for 1.
end

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function love.load()
    -- Initialize everything
    timer = 0
    maxTimer = 1
    hour = 0
    minute = 0
    seconds = 0
end

function love.update(dt)
    increaseTime(dt)                                      -- call the function increaseTime
end

function love.draw()

end

function increaseTime(dt)
    timer = timer + dt                                     -- increase timer every frame

    if timer >= maxTimer then                              -- if 1 second past reset timer and increase seconds
        seconds = seconds + 1
        timer = 0
    end

    if seconds >= 60 then                                  -- if 1 minute past reset seconds and increase minute
        seconds = 0
        minute = minute + 1
    end
    
    if minute >= 60 then                                   -- if 1 hour past reset minute and increase hour
        minute = 0
        hour = hour + 1
    end
    -- print(timer)
    print(hour,minute,seconds)                             -- print(hour,minute,seconds)
end

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function increaseTime(dt)

    timer = timer + dt

    if timer >= maxTimer then
        seconds = seconds + 1
        timer = timer - maxTimer
    end

    if seconds >= 60 then
        seconds = seconds - 60
        minute = minute + 1
    end
    
    if minute >= 60 then
        minute = minute - 60
        hour = hour + 1
    end

    print(hour,minute,seconds)

end

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function love.mousepressed(x, y, button, istouch)
  T = love.timer.getTime()
end

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function love.mousereleased(x, y, button)
   DT = love.timer.getTime() - T
end

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function love.draw()
  if T then
    love.graphics.print(T, 0, 0)
  end
  if DT then
    love.graphics.print(DT, 0, 20)
  end
end

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function disp_time(time)
  local days = math.floor(time/86400)
  local hours = math.floor(math.mod(time, 86400)/3600)
  local minutes = math.floor(math.mod(time,3600)/60)
  local seconds = math.floor(math.mod(time,60))
  return string.format("%d:%02d:%02d:%02d",days,hours,minutes,seconds)
end