What is the cheapest day to book flights on Expedi𝖆?

[𝗥𝗲𝗳𝘂𝗻𝗱~𝗠𝗼𝗻𝗲𝘆]𝗪𝗶𝗹𝗹 𝗘𝘅𝗽𝗲𝗱𝗶𝗮 𝗿𝗲𝗳𝘂𝗻𝗱 𝗺𝗲 𝗶𝗳 𝗜 𝗰𝗮𝗻𝗰𝗲𝗹?