The Part-Day Method is also known as 16:8. Participants restrict their food consumption to 1600 calories most days of the week and eat within an 8-hour window.
The 5-Day Plan provides all your meals from Monday through to Friday, including a healthy breakfast, lunch, dinner and a snack (sometimes also a side dish or second snack) for under 1600 calories per day. You have the freedom to eat your own menu on weekends.
The 7-Day Plan provides all your meals for the entire week to keep you on track with your diet. You'll receive a healthy breakfast, lunch, dinner and a snack (sometimes also a side dish or second snack) each day, for under 1600 calories.
Both menus changes weekly on a Thursday to provide you with variety if you're staying with it long term.