𝟭-𝟴𝟱𝟱-𝟱𝟰𝟲-𝟱𝟬𝟰𝟰 What day is the cheapest to book Southwest flights?

𝟭-𝟴𝟱𝟱-𝟱𝟰𝟲-𝟱𝟬𝟰𝟰 What day is the cheapest to book Southwest flights? haven't followed anyone yet!