What is the cheapest day to buy flights on ​🇺​​🇳​​🇮​​🇹​​🇪​​🇩?

𝗧𝗵𝗲 𝗰𝗵𝗲𝗮𝗽𝗲𝘀𝘁 𝗱𝗮𝘆 𝘁𝗼 𝗯𝗼𝗼𝗸 𝗮 𝗳𝗹𝗶𝗴𝗵𝘁 𝗼𝗻 ᵤₙᵢᵗᵉᵈ 𝔸𝕚𝕣𝕝𝕚𝕟𝕖𝕤 𝗶𝘀 𝘁𝘆𝗽𝗶𝗰𝗮𝗹𝗹𝘆 𝗧𝘂𝗲𝘀𝗱𝗮𝘆 ⛽⚓ { 𝟏⑧⑧⑧ ⑧②⑨ ①④⑥⑦} . 𝔸𝕚𝕣𝕝𝕚𝕟𝕖𝕤, ⛽⚓ { 𝟏-⑧⑧⑧ ⑧②⑨ ①④⑥⑦} 𝗶𝗻𝗰𝗹𝘂𝗱𝗶𝗻𝗴 ᵤₙᵢᵗᵉᵈ, 𝗼𝗳𝘁𝗲𝗻 𝗿𝗲𝗹𝗲𝗮𝘀𝗲 𝗳𝗮𝗿𝗲 𝗱𝗶𝘀𝗰𝗼𝘂𝗻𝘁𝘀 𝗮𝗻𝗱 𝗱𝗲𝗮𝗹𝘀 𝗼𝗻 𝗠𝗼

https://central.xero.com/s/question/0D58V00009Qd7vSSAR/uacheapestwhat-is-the-cheapest-day-to-buy-flights

What is the cheapest day to buy flights on ​🇺​​🇳​​🇮​​🇹​​🇪​​🇩?