So you want to know the National food days, and you want to use those to find a bargain or a discount?  That sounds pretty straightforward.
assitant
What do you think of when I say that there are some “National food days” that you should use for your purchases?
assistant
Do you know which days of the year are dedicated to National food days? I want to take advantage of some of them.
user
Can you tell me more about what you’re hoping to accomplish?
assistant
Well, I hear that for some National food days, you get a discount or free item at places that sell the particular food being sold.
user