Black Friday, the day after Thanksgiving Day, marks the biggest day for shoppers in the United States. This year Black Friday falls on 29 November.

However, the US retail phenomenon's craze has now caught the United Kingdom too as some retailers offer Black Friday deals.

With newspapers carrying ads already and websites flashing deal alerts, retailers have begun luring in shoppers with lucrative deals. The excitement about shopping is inevitable.

In the United States, retailers open their doors as early as 5 am or some even in midnight on Black Friday and Thanksgiving.

In contrary, UK's Black Friday shopping extravaganza happens mostly online.

As Black Friday heralds the start of month-long shopping for Christmas, here's a list of some of the most celebrated online retailers and their tempting deals on offer for Black Friday shoppers:

Amazon UK

Amazon UK has been running the Black Friday Deals Week every year since 2010. This year, the week will start on 25 November and feature over 2,000 time-limited offers on products across all categories, including electronics, video games, clothing and more.

The online retailer will put the offers again over the Black Friday Reloaded weekend on 29 November. For Amazon UK's Black Friday 2013 deals, click here.

Apple Store

The Apple store is offering a clearance sale of some of its refurbished products that according to Apple, are tested and certified and include a one-year warranty. The refurbished Apple products on offer include iPad 2 (Wi-Fi+3G 64GB second generation white and black models), iPod, Mac and Mac accessories. All the products available are as "good as new."

"Before we put a refurbished Mac, iPod, iPad or Apple TV up for sale in Special Deals, it undergoes a rigorous refurbishment process to make sure it's up to Apple's tough quality standards. We back it with our standard one-year limited warranty. And you have the option of purchasing an AppleCare Protection Plan for it," a statement on by Apple reads.

Check Apple's special deals online here.

Asda UK

Be it around Thanksgiving, Black Friday or Christmas, Asda offers one of the best online deals in UK. This year, the giant retailer has offers under £5, £10 and £20. Plus there are free delivery offers and fresh deals daily under Today's Offers category.

For the month of November, when Thanksgiving and Black Friday happen, Asda is offering over 3,000 offers across its broad merchandise of toys, upholstery, baby products, furniture, cookware, lights, home decor, kitchen appliances, Cds, Dvds, Blu-rays, books, games software, hardware and accessories and more.

Check out the products available online on special discount at Asda here.

Debenhams UK

For those looking for apparel shopping around Black Friday or for Thanksgiving and even for Christmas, Debenhams is running designer event featuring 25% off on all designer womenswear, menswear, kidswear, shoes and boots as well as designer home decor items. The online retailer also has half-price offer on toys. In fact, the Debenhams is predicted toys' best sellers for this Christmas. Click here to shop at the Debenhams UK.