A record $23.8 billion in sales is expected to be spent by consumers for Amazon Prime Days, Adobe said in a forecast released on July 7. That's a 28.4% increase year over year and $9.6 billion more than the comparable period last year. Last year, shoppers spent $14.2 billion during the two-day Amazon Prime event, according to Adobe.

Amazon is extending its annual Prime Day sales and offering new membership perks to Generation Z shoppers amid tariff-related price worries and possibly some consumer boredom with an event marking its 11th year.

Amazon's big annual sale officially kicks off Tuesday, but Prime members can find great deals now before any potential price hikes.