"Locally? I believe it's sometime in the middle of February." The fact didn't mean anything to Ky, who was rather oblivious of non-religious holidays, particularly those that focused on romantic attachments.

"Why?" Ky fixed Sol with a suspicious look. "Does that make it your birthday?" Well she couldn't help being curious about that. That sort of thing only became a mystery when she realized how well it was concealed.

It wouldn't explain why Ky didn't want to seem to leave, but as far as Ky was concerned not much could.