sales event is a noun meaning "an occasion (usually brief) for buying at specially reduced prices". It carries one recorded sense.
an occasion (usually brief) for buying at specially reduced prices
“they held a sale to reduce their inventory”
“I got some great bargains at their annual sale”
Definitions, synonyms and semantic relations for sales event come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.