How to make special days your new secret marketing weapon Promotions on unusual ‘Special Days’ (e.g. World Tourism Day, anniversary of first purchase) are more effective at increasing sales. In one experiment, people were 25% more likely to buy. You can create three types of special day promotions: Existing special days (e.g. World Water Day) Your company’s own day (e.g. Amazon Prime Day) Personalised special offer days (e.g. anniversary of the first time a customer bought from you) Special days must be creative and original while fitting to your brand and product. They won’t work if many competitors use them too (e.g. Father’s Day).