Breakfast is often touted as “the most important meal of the day.”

But sometimes, there isn’t enough time to whip something up in the morning.

And if you’re on the go,swinging by the drive-thrucould be the bestor onlyoption available.

fast-food breakfast items on a yellow background

Photos: The brands. Design: Eat This, Not That!

And as fast-food customers already know, these options continuously evolve.

Take McDonald’s, for example.

Of course, not all breakfast offerings areavailable throughout the day.

mcdonald’s hash browns, breakfast sandwich, and coffee

Moab Republic / Shutterstock

Many fast-food chains have set breakfast hours, which are solely dedicated to serving specific menu items.

After that, these options aren’t available.

That’s why we put together a handy guide on the current fast-food breakfast hours at 14 popular chains.

chick-fil-a breakfast biscuit sandwich and hash browns

James Andrews1 / Shutterstock

Opening times can vary, as well, with some locations opening as early as 4 a.m.

Meanwhile, other McDonald’s locations are open 24 hours a day.

Starbucks has you covered.

glass of coffee next to Panera’s sausage, scrambled egg, and cheese on an asiago bagel

Panera

White Castle

White Castle’s breakfast sliders aren’t solely limited to a specific time window.

Anyone in the mood for a late-night breakfast burger or pancake platter?

However, because the restaurants are independently owned and operated, menu offerings and times can vary by location.

starbucks breakfast sandwich on a napkin

Deutschlandreform / Shutterstock

How about tacos at 8:30 a.m. in the morning?

Jack in the Box is one of those special chains that offers its whole menu all day.

white castle’s waffle breakfast sliders

White Castle / Facebook

whataburger breakfast burger and drink

Courtesy of Whataburger

burger king breakfast sandwich, french toast sticks, hash browns, and dipping sauces

Burger King / Facebook

person holding dunkin' sourdough breakfast sandwich

Dunkin' / Facebook

person holding subway’s breakfast flatbread next to a cup of coffee

Subway / Facebook

jack in the box breakfast

Jack in the Box / Facebook

wendys breakfast

Deutschlandreform / Shutterstock

taco bell $5 breakfast box with sausage burrito

Courtesy of Taco Bell

sonic-french-toaster-breakfast-sandwich

Sonic Drivein / Twitter

hardees breakfast

Hardee’s / Facebook