Today Walmart leapfrogged the pack with 20,000 items on sale for the holiday season.

When Halloween ends on Friday, Walmart will be switching over its stores to greet the holiday season.

On Saturday, the retailer will offer more than 20,000 "rollbacks" or sale prices on items including groceries and popular brands such as Disney "Frozen," Teenage Mutant Ninja Turtles, Samsung, and Dell.

Then, on Monday, Walmart will relaunch its 24-hour holiday cyber savings event, in which customers can take advantage of free shipping on millions of items from Walmart.com. Orders must exceed $50 for free shipping. Walmart said it has expanded its online offerings to include 7 million items – one million more than last holiday season.