Online spending among shoppers on the first ‌day of Amazon's Prime Day rose 5.3% from a year earlier to $8.3 billion across U.S. retailers, Adobe Analytics said on Wednesday.

The four-day ‌shopping event, which started on ​Tuesday and is being held earlier than usual this year, will be ⁠a litmus test of U.S. shoppers' spending ​power as the focus shifts to essential goods.

Here ⁠are some key details:

Online spending on Tuesday is tracking ahead of its projections and marks ‌the biggest e-commerce day so ​far in 2026, Adobe ‌said.

The data firm reaffirmed its forecast of ‌U.S. retailers driving $26.3 billion in online spend through the event.

Adobe said sales were ⁠driven by categories such ‌as electronics and appliances, ⁠tools and home improvement, but purchases of everyday ⁠essentials ⁠also ticked up.

Discounts are expected to remain in ‌the 10% to 24% band seen on the first day, Adobe said.

Adobe's forecast is ‌based ​on an analysis ‌of 1 trillion visits to U.S. retail e-commerce sites, covering 100 million stock keeping ​units and 18 product categories.