Shopping deals on Black Friday and other end-of-year savings have contributed to the "Christmas creep": the holiday shopping season inching earlier and earlier, stretching over many weeks before the end of the year.

This year, the frenzy that usually begins immediately after Thanksgiving, will begin as Halloween decorations are still up.

Beginning in November, Amazon and Wal-Mart will be marking down prices for the holidays, kicking off shopping early by nearly a month. These giant retailers are among several others promoting their Black Friday deals in the beginning of November.

Amazon spokeswoman Julie Law said that while the e-commerce leader has hyped its holiday deals in the early days of November, this year will offer more sale products and more frequent deals. Amazon will increase its deal of the day to include two products every day from Nov. 1 through Dec. 22.

The online company will also ramp up the frequency and number of products listed as "lightning deals" in these first weeks, from Nov. 1 through Black Friday weekend. These lightning deals are products that are on sale for a limited length of time each day. As the days until Black Friday draw closer, Law said the deals will go up for an additional 10 minutes.

Products in higher demand for the holidays, including electronics, toys and cookware, will be those featured in the deals.

Walmart will be slashing prices on more than 20,000 products beginning Nov. 3.

This large number of "rollback" inventory is more than in previous years, according to the executive vice president of general merchandise Steve Bratspies. At any one time, Wal-Mart typically has around 10,000 rollback items.

Online, Wal-Mart will be previewing Cyber Monday activity with a 24-hour deal event Monday, Nov. 3. This will also give the business a chance to test its new online price-matching program in some markets before the hectic holiday season.

Office Depot, OfficeMax and Sears will also be featuring online and in-store savings before Black Friday.