National Coffee Day, Thursday, Sept. 29, is upon us again, and as fake holidays go, this one is pretty decent.

A number of retailers are offering specials and promotions. Here is a roundup:

McDonald's: McDonald's in Massachusetts, New Hampshire and Rhode Island will offer a free any-sized McCafe Hot Coffee (including Pumpkin Spice or any other flavor) with any food purchase.

Cumberland Farms: The Framingham-based convenience and gas chain is running two promotions.

On National Coffee Day, Cumberland Farms is giving away a free Farmhouse Blend or Bold coffee, hot or iced, in any size. To get one, customers must text the word FREECOFFEE to 64827 using their smartphone, and will receive a mobile coupon for a free hot or iced coffee, in any size the coupon can only be redeemed on National Coffee Day.

On Fridays throughout the month of October, Cumberland Farms brings back its customer favorite, "Free Coffee Fridays." Beginning Oct. 7 and continuing each Friday throughout the month, customers can get a cup of coffee -- hot or iced, in any size, for free.

Dunkin' Donuts: Dunkin' Donuts locations in Massachusetts are marking the chain's 66-year history by selling a medium hot coffee for 66 cents.

Starbucks: The Seattle-based coffeehouse chain is taking the altruistic approach. Starbucks will donate a coffee tree to a farmer in the Mexican state of Chiapas on behalf of each customer who purchases a brewed Mexico Chiapas coffee in a participating U.S. and Mexico stores on National Coffee Day.

The effort is meant to battle a persistent coffee rust blight in the region.