limited-time sale; timed discount sale; flash sale
A retail sale or discount offered only during a specified short time, especially in shops, supermarkets, and online stores. This is wasei-eigo; English speakers would usually say “limited-time sale” or “flash sale,” not “time sale.”
wasei-eigo (Japanese-coined English), from time sale
A limited-time sale starts at the supermarket at three in the afternoon.
The boxed lunches were half price in the limited-time sale.
The flash sale starts at 3 p.m.
That supermarket holds a flash sale every weekend.
I bought a TV during the flash sale.
The shoes became half price during the flash sale.