You can go back to a pre-FatSecret date. I followed the instructions below to go back to the date I actually started my diet which was before I joined here. I wanted to log my prior progress so my weight loss would be accurate. The following worked for me. I found this on the "Help" section on here.
"Can I backdate my diet start date and enter historical weight entries?"
Yes, you can enter your weight information up to 6 months from the time you become a FatSecret member. Go to your "My FatSecret" page and in the top right hand "my profile" box click on "my diet". Once there click "enter historical weight" and enter your historical weight information.
When you clicked the date you want, it turns blue but the square stays on "today". Go ahead and highlight the right date and enter your prior weight and it will be reflected on your log. At least it worked for me.
Debbie, Tarpon Springs, FL
~~~Never walk in the footsteps of others, or you won’t leave any of your own.~~~