Hi I find the 6pm till 6pm confusing but thats just me , I like things simple, since I started Juddd the first time back in Jan there have been members who do the 24hr rule i.e up day from 6pm till 6pm the next day (or whatever time choice they may prefer), but I have always done my days as in days so if today is an UP day its an UP day from the time I get up till the time I go to bed and so on for DD s , simple and easy, so I can't really help much as to how the 500 cals fit into that and as its in the same day do you count it in your UP cals ??? Hopefully someone who gets that pattern will help soon. The one draw back I see with the timed 24 hr regime is that you have restriction everyday, yes you eat everyday but you have to restrict at some part of the day. With day to day yoiu have no restriction on your UP day?? But its down to the individual and what suits your lifestyle, sorry I can't be more help x