opening sale; grand opening sale
Wasei-eigo from 'open sale'; refers to a sale held when a store first opens, often with special discounts or promotions.
wasei-eigo (Japanese-coined English), from open sale
The newly opened supermarket is having an opening sale.
A flyer for the grand opening sale was included.
Variant with interpunct; less common but seen in some signage.
Wasei-eigo from English 'open' + 'sale', meaning a sale held at a store's opening.