We are looking to count down days, something like 3-6 months, perhaps something like DDD:HH:MM or larger days on top and HH:MM below. Something that would work on a basketball court, say 20-30cm character size.
OTS would probably be OK if not too expensive.
Or if there is a large display that could work easily with Arduino, then I'd be willing to program that. My skills are so-so in that context though, but I imagine there is a library that makes a larger dot matrix display doable?
Are there such large dot-matrix displays or a commercial product that could fit the bill? Of course I searched and the ones I saw did not really seem to fit the function or if they did it was not very clear.