Work does that to ya.

On the bright side, at least you didn't sleep in and waste your day off!

Better to go in accidentally on a day off than to accidentally not go in on a day on! :p

At least that shows dedication, but perhaps some absentmindedness as well.

You should have left with an expression like "It's my day off! And you guys need to work!" Not in an arrogant way though but rather jokingly.

Check your schedule regularly

Oh no! Hope you don't live too far from work! Only upside is at least you were late when it didn't matter.

done this before lol

That dedication inspires me

Walk of shame? Would have been a walk of joy for me. Sure, it's a little embarrassing, but you could go home and go back to sleep.