Oh, now you tell me!
I went out to dinner with my ex-girlfriend last night.
She said, 'Do you know what day it is?', and I said, 'Well, actually, yes. I did read something on the internet, but I have to say I'm rather surprised that you're bringing it up.'
I began to wonder if her untypical choice of the steak pizza was a favourable portent. I translated the name of EL's festival. She didn't seem offended or confused, so I suppose at least now I know it's within her conceptual understanding.
Anyway, she's now my ex-ex-girlfriend, or in other words my girlfriend, again.