Editor's note: Not every restaurant in a chain may be honoring these promotions, so be sure to check with local restaurants to confirm which deals are available before you go. Most can’t be used with any other discount or coupons. Prices may vary with location.

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According to NationalDayCalendar.com, Sunday, Sept. 29, is National Coffee Day, and several businesses are celebrating the "holiday" with freebies and deals.

Here are a few we've found:

1. Dunkin'

Customers who buy one hot coffee can get a second one free Sunday at participating locations, the chain said in a news releaseClick here to find a store near you.

2. Krispy Kreme

Looking for a sweet treat to go with your java? The doughnut chain said it is offering two freebies at participating stores Sunday: a free Original Glazed Doughnut and a coffee. See a list of participating locations here.

3. Caribou Coffee

Customers can buy a $1 medium coffee, a $2 medium Cold Press or a $3 Nitro Black at participating locations, the company saidClick here to find a store near you.

4. Barnes & Noble

Customers at participating Barnes & Noble Cafes can "get a free tall hot or iced coffee ... with your purchase of any bake case item," the company tweeted SundayClick here to find a location near you.

5. Love's Travel Stops

On the road? Participating Love's Travel Stops are offering a large coffee or hot beverage for $1 on Sunday or Monday, the company said in a news release. The chain said proceeds from the items will go toward its Children's Miracle Network Hospitals fundraiser. Check out the Love's store locator here.