Well, I need something like a ban sistem, where the plugin can realize weather If the time specified in a timestamp (or wichever format you may want to use and you think it's convenient) is previous than now, or not, In simple words, it checks if you are still banned.
I have knowledge about MySQL, and plugins, though I don't really realise how to handle well with strings to manage with time, which is pretty hard since of the different sizes of months and else.