When did Consort Song of the Han Dynasty die?

a href="http://en.wikipedia.org/wiki/Consort_Song" rel="nofollow"http://en.wikipedia.org/wiki/Consort_Son…/a says both the elder and younger Consorts Song took poison in 82 C.E. rather than wait for court intrigue to take a more gory path. But I can't find a reference to what date, or even rough time of the year, this happened. (I'm writing a time travel story and I want to get the details at least reasonably right.)