take one day off the algorithm.

Hello, Thanks for your plugin! I’m trying to do something a little different. I want to make changes to the algorithm you have in place by taking away (-) 1 DAY. Reason being I don’t want to use it for next day delivery but to give my customers heads up to when they have to order by for their order to be dispatched on that very same day (14:00 ). I want to use $current_day rather than $currentday+1. I’m a beginner to Php and at first, i thought I done the trick however because we don’t ship on weekends I think that messed it up a little.