Panic! At The Disco - The Calendar Lyrics Meaning

This son is basically about the breakup in 2009, when Ryan and Jon left the band.

"Put another ex on the calendar" is referring to ex band members, and many people often seem to mistake the 'ex' for an actual 'x,' but I guess it could go both ways. "Summer's on it's deathbed; there is simply nothing worse than knowing how it ends.." is just saying that since the band broke up during the beginning of summer, it probably ruined a lot of Panic! At the Disco's fan's summers; they would be 'dead,' so to speak. That, or ever since the split, that summer was never the same for Brendon, Spencer, Ryan, and Jon. "There is simply nothing worse than knowing how it ends" is just saying that the band was most likely expecting this sooner or later, I believe, considering AFYCSO was so different than P.O.

"I will come back to life, but only for you..." is Brendon saying that the band will become just as good as it did when Ryan and Jon were still in the band - 'come back to life' - but needs his fans there to support him and help him when times are tough.

"You said if you don't let it out, you're gonna let it eat you away..." I think describes the moment when the band all sat down and discussed the breakup. That Brendon could see that it was killing Ryan to let him know what was on his mind; their 'musical differences.'

"I'll sleep in the hive, I guess all the buzzing got to me..." means that Brendon got tired of hearing all the 'buzz' about the breakup; he's just tired and needs time to think about everything.

"At night, your body is a symphony, and I'm conducting..." I have no idea what this means. Maybe there's a whole other story line I'm overlooking? It might mean that Brendon's comparing something/someone to a symphony, and that'll give him inspiration to write an album. I'm honestly not sure.

"Pray I could replace her, forget the way her tears taste..." Brendon hopes that he can find an easy replacement for Ryan and Jon, even though it will never be the same. Tears are referring to how sad the mood was during the breakup. Although nobody cried, it was a horribly depressing moment.

"And I meant everything I said that night..." the lyric before "I will come back to life..." I myself picture Brendon and Spencer talking about what they're gonna do now that the band broke up.

"Dont wanna call it a second chance, but when I came back, it was more of a relapse...." Brendon was set in a daze/shock by the split, and when he finally snaps out of it, he describes it as a 'relapse.'

"Anticipation's on the other line, and obsession called while you were out..." anticipation meaning eager to crank out a new album, maybe? Showing that there's a fine line between anticipation to get something done and an obsession with it... I'm not entirely sure.

I'm sorry of this was hard to follow, everything was just sort of thrown together in my mind.