Possibly they knew you were a regular customer and gave you the hookup?

What a pleasant happy birthday to you! Just take the discount as a late bday present :)

FML because someone gave you a discount? What next? FML a stranger smiled at me. 

FML becasue someone thought OP was 5 years older than they are. That bothers some people.

Lol when I used to McDonalds I'd give the coffee discount to anybody who looked that they /could/ be over 55, even if I didn't know for sure. Why? It saved me the trouble of asking, and nooo manager was paying attention if I gave it to somebody under the age. And tbh there was many, many seniors who were so picky about getting their discount, it just became a habit. I don't think it's fair to say why the discount was issued, and for OP to assume they suddenly looked much older or something. I

In his defence he only scowls at kids who run on his lawn. He doesn't shout at them yet.

Well maybe they're going to make the senior discount an every time thing for you since you're a regular customer? $1 off an order that you get all the time adds up ?

And you wonder why there's a stigma about asking a female their age. I wish I can roll my eyes harder.

Just take the win.

This would be fyl if you where 30-40, they only slightly misgauged your age and you got a discount, what's so bad about that?

This seems like a win to mez

Reminds me of that Scrubs quote:

Carla: Wow. Well you better get cracking (on having kids), what are you, like forty-five?
Janitor: (Hurt look) Forty-three. I know I look a little older but that’s just because I drink and smoke heavily and work with chemicals and sleep on my face.

And he was pissed because she was two years off and he swore revenge.  Seriously, I wouldn't worry about it if you're five years off.  Twenty years, sure.  Although, when wo

Reminds me of that Scrubs quote:

Carla: Wow. Well you better get cracking (on having kids), what are you, like forty-five?
Janitor: (Hurt look) Forty-three. I know I look a little older but that’s just because I drink and smoke heavily and work with chemicals and sleep on my face.

And he was pissed because she was two years off and he swore revenge.  Seriously, I wouldn't worry about it if you're five years off.  Twenty years, sure.  Although, when wo