If caffeine is the music in your ears, the spring in your step, the very blood in your veins, well, tomorrow is your big day: National Coffee Day is Sept. 29, and with it comes a pile of offers from U.S. java joints for free or discounted coffee. We’ve got the goods on where to score your cheap fix in honor of such an important day.

As always, some deals might not be offered at your local restaurant or chain, so call ahead to make sure you don’t get there and face disappointment.

Krispy Kreme: Customers can get a free small coffee and a free Original Glazed doughnut at participating locations in the U.S. on Sept. 29.

Dunkin’ Donuts: Medium hot coffee is just $0.66 tomorrow in honor of the chain’s 66th anniversary.

The Coffee Bean & Tea Leaf: All non-franchised stores will offer a free espresso shot when customers download the new mobile app. Guests who already have the app downloaded will get double points.

WaWa: The regional chain is offering a free cup of coffee (self-serve, up to 24 ounces) tomorrow.

Peet’s Coffee: Peet’s will give away a free medium drip coffee with the purchase of any fresh food item at participating cafe locations.

Sheetz: Customers who can show their registered My Sheetz Card can have a free small cold brew coffee, which is a new offering for the chain starting on Thursday.

Cumberland Farms: On National Coffee Day, customers can 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 — but the coupon can only be redeemed Sept. 29. Fast forward to every Friday in October, when the chain will offer any size of iced or hot coffee for free.

Keurig: Keurig will be offering deals on several coffee items through Oct. 2, including 20% off Green Mountain Coffee recyclable K-cup pods, and 15% off other beverages like the Original Donut Shop with the code GREENSAVINGS at checkout.

Dairy Queen: Now through Friday, Sept. 30, customers can get a small iced coffee for $1, an Ultimate Frappe for $2, or a Premium Fruit Smoothie for $2.

Maui Wowi Hawaiian: The chain is dangling 50% off online orders for customers shopping on the company’s site if they use the promo code ALOHACOFFEE at checkout.

Pilot Flying J: Guests can receive one free small cup of Pilot Coffee or another hot beverage of their choice, including tea and cappuccino in the U.S. and Canada on Sept. 29. To get the free coffee, you’ll have to display an online coupon via Pilot Flying J’s Facebook page at the time of purchase in-store.

Illy: The brand is offering special deals on coffee and coffee makers all month long, including on Sept. 29, and there are a bunch of’em: $100 off X1 Machine; a complimentary Illy KeepCup with orders $75+ using the cod UEKEEPCUP16; 15% off online orders of $75+, 20% off orders of $150+, and 25% off orders of $225+ using the code UEFLASH16B; four boxes of K-Cup Pods for the price of three; free X7.1 in red or black with a subscription; and $150 off Y5 Espresso & Coffee Machine.

Atlas Coffee Club: The first bag of coffee is free for folks who sign up for a monthly subscription to Atlas Coffee Club, a travel themed coffee subscription. Use the discount code: coffeetravels2016.

Giving Back

Instead of offering freebies to customers, these chains are using National Coffee Day to give back to others.

Caribou Coffee: The chain will donate a free cup of coffee to caregivers at health facilities and hospitals across the country when people purchase a cup of Amy’s Blend coffee — sales of which support CancerCare — on National Coffee Day.

Starbucks: Starbucks will donate a coffee tree for every brewed cup of México Chiapas coffee customers buy on Sept. 29.

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