[She might actually be giving him too much credit, but he'll take it. He tilts his head thoughtfully, frowning at the answer.]

Spring, huh...

[In that case, they'd have missed it. Joint party in August then, maybe? It would suck to wait a whole extra year to celebrate, after all.]

Okay, that narrows it down to three. By the Eosean calendar, that's March, April, and May. [Hmm, hmm, hmm.] May has the most letters from your names, and it's a transitional month at the end of it, too- when the weather starts shifting from spring to summer. The dual nature could be kind of an inside joke, right?