Wasn't there already a Prime Day this spring? Allow me to remind you that Prime Day is now a quarterly event, as Amazon has gotten even more voracious with these days-long deals events. There's the Spring Sale in March, Prime Day in June, October Prime Day, and Black Friday, which now lasts a week, for some reason. When is Amazon Prime Day? This year, Amazon Prime Day runs from Tuesday, June 23, to Friday, June 26. How did we choose these early Amazon Prime Day deals?I spend lots of time writing about technology. I also think most of these sales events are marginally helpful for shoppers. It is more an opportunity for big retailers to reignite interest in their own products (and sell inventory) than it is an opportunity for shoppers to get good deals. Still, good deals exist during these events, so I'll tell you about them when I see them. And if you just so happen to be in the market for one of these devices, I'll lead you in the right direction. I use established price comparison tools and trackers to determine whether the deal is actually on sale and how frequently it drops. As someone with great familiarity with these products, I also remember the prices of these products and when they've gone historically lower or higher. This helps me determine if it's actually worth buying. If it's not, I'll tell you so. What are the best Prime Day deals so far?ZDNET's experts are searching through early Prime Day sales to find the best discounts by category. These are the best deals so far:Best Prime Day dealsBest Prime Day TV dealsBest Prime Day laptop dealsBest Prime Day SSD dealsBest Prime Day phone dealsBest Prime Day smartwatch dealsBest Prime Day headphones dealsBest Prime Day tablet dealsBest Prime Day gaming dealsBest Prime Day robot vacuum dealsBest Prime Day Apple dealsBest Prime Day Samsung dealsBest Prime Day deals under $25And the best deals from competing retailers:Best Costco dealsBest Sam's Club dealsBest Walmart deals