Which ancient civilization pioneered the use of 'sale days' tied to religious festivals as one of the first documented retail promotional strategies?

Long before modern malls and digital marketing, ancient civilizations developed sophisticated retail strategies to promote their goods. From market festivals in Mesopotamia to elaborate trade shows in Ancient Rome, promotional tactics have deep historical roots. This trivia question explores how ancient merchants used early forms of retail promotions to attract customers and boost sales in some of history's earliest marketplaces.

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Ancient Babylonians, who held discount bazaars during the Akitu (New Year) festival
Ancient Egyptians, who offered special pricing during Opet festival celebrations
Ancient Greeks, who created promotional events during the Olympic Games
Ancient Romans, who introduced seasonal sales during Saturnalia celebrations