Pricing that are done during seasons to attract buyers. (Ex, Christmas, rainy season.) rainy: bikini and swimwear are cheaper compared with summer season. summer season: jacket or winter clothes are on-sale as compared to rainy season. At drugstore-they have special offering during seasons, like buy1take1 or promotional price in cough and cold and antihistamine. During summer season- they have a promotion on antidiarrheal and ORS.