Maybe they don't have calendars in your public housing. I'll help you out.
Romero tested positive by USADA on January 13, 2016. On April 4, 2016, he agreed with USADA to be suspended for 6 months. Weidman was injured on May 17, 2016, for a fight with Luke Rockhold for the middleweight belt on June 4, 2016 at UFC 199. Romero would certainly been ahead of Bisping to step in against Rockhold, given that Bisping had lost previously to Rockhold and Romero had beaten Souza in December of 2015. But Romero was suspended by USADA.
As I said, part of the reason Bisping is champion is because of USADA. But for Romero testing positive by USADA in January of 2016, he would have fought Rockhold at UFC 199.
"Despite still being under suspension
for a positive drug test,
Yoel Romero (11-1 MMA, 7-0 UFC) also piped up,
typing in Spanish, “I’m here! #andnew”"
http://mmajunkie.com/2016/05/after-...d-charge-of-volunteers-for-ufc-199-title-shot
Get back on the short bus, buddy.