The best chance to get a free meal was actually yesterday. But, there are still plenty of chances to get free food before the 14th.

According to the website The Penny Hoarder.

Monday, Feb. 2 is the big kickoff, so each location will have 10 winners in the morning, 12 winners during lunch time, and 13 winners in the late afternoon.
On Feb. 3, your chances of winning are slightly higher during breakfast and lunch.
On Feb. 4, 5 and 6, visit during breakfast or lunch, as there will only be one winner during each of those late-afternoon periods.
On Feb. 7, there will be four winners in each location in the morning, with three winners during both the lunchtime and late-afternoon time slots.
Finally, don't try your luck between 3 and 6 p.m. on Sunday, Feb. 8. There will be no winners during that time.

Plenty of people are already cashing in by paying with lovin'.