Perk up, coffee fans.

Tuesday is National Coffee Day, the ultimate day to get – and stay – caffeinated for little or no cost. 

Restaurants, convenience stores and brands alike are toasting the made-up holiday, which is held annually on Sept. 29, by giving away free coffee and serving up discounted brew.

The free cups might also help you stay alert during the first presidential debate between President Donald Trump and former Vice President Joe Biden. The 90-minute debate starts 9 p.m. ET.

Starbucks is starting the holiday early for members of its updated Starbucks Rewards loyalty program that launched Sept. 15.

Save better, spend better: Money tips and advice delivered right to your inbox. Sign up here

On Monday, the Seattle-based coffee giant kicks off its month-long “Starland” augmented reality game with more than 2.5 million prizes like free coffee, free breakfast and stars.

Then on Tuesday, members who