There is atleast one CD in the game (the merchant who sells relics) with 24h on it.
Please reduce the timer to 20h.
The reason is pretty simple.
People, who play daily, do that pretty often at more or less the same time - like after work for an hour or two. With an 24h CD they will need to skip visiting that merchant every few days, with bad luck every second day.
People who dont play daily arent affected by an 20 or 24h cd at all.