I can typically maintain a 16:8 IF on days when I'm not working i.e. weekends and other holidays. On those days I don't have to be up early to walk to work etc so I can sleep in and skip breakfast, and have a slightly earlier lunch.

I don't try and force it though; my overriding rule is that I will still eat when I'm hungry. But that goes both ways as well; if I'm not hungry for dinner for example, then I won't have dinner either. So I guess I'm an incidental IFer more than anything. I just let it happen naturally.

As blue says, we're all different.