The 24 hour fast once a week would fit mine a whole lot better.
i do the 24hr fast every now ... like on a weekend out at the lake ...i'll eat supper the night before and not eat until supper the next day...
the only thing about eating at the same window is your body gets in habits and mine expects me to eat at lunch... so sometimes if i'm going for the 24hr there is a period around lunch where i get real hungry for a little while... but it goes away, and you body gets better at tapping your bodyfat for fuel.
the real thing that matters is calories (and macros) over the course of a week... so if you are shooting for an average of 2500 cals a day, thats 17500 a week. you could eat 1500 calories one day and 3500 the next as long as the weeks cals add up. i believe calories varied like this is the best method..