Ahh, Mother’s Day. An entire day for time-starved moms to rest, relax and luxuriate in hours and hours of freedom from real-world responsibilities.

Right?

Wrong! Moms know the truth; the “celebration” is just another day of juggling multiple jobs, from pretending to enjoy eating eggs in bed — um, gross — to cajoling the kids into finger-painting multiple Hallmark cards in time for the Grandmas to show up for lunch.

So, here’s something I can say for Tim Hortons’ new Mother’s Day promotion: they know what’s up.

The Canadian chain — think Dunkin’ Donuts with cheerier staff — is offering a free, “Mom-sized” ice coffee Sunday, to all customers who identify as mamas (the press release points out that the promotion includes “dog moms,” too).

And the caffeinated drink isn’t a cute little medium-bear beverage, either. This is a 52-oz super-sized gas tank of coffee. That’s almost a half-gallon of fuel to keep mama zooming as she takes a literal pot o’ joe to the dome.

In other words, that’s one jittery manicure; an aggressively chatty massage; a yoga class that turns into Zumba-for-one as all the carefree twenty-somethings in the class give confused side-eye from their downward dogs.

But Tim Hortons knows the truth: pampering and “Namaste” is not what real Mother’s Day is about.

It’s about the joy of spending time with your messy, wild, imperfect family.

But here’s a thought: Dads, instead of sending Mom out to pick up donuts, and letting her begrudgingly mutter “Mom-sized” so she can guzzle her free half-gallon of coffee on the way home, maybe give her a few minutes to Dyson the omelet remnants off the duvet in peace while you run the errand yourself.

It is Mother’s Day, after all.