Zimmerman is the former Neighborhood Watch volunteer charged with second-degree murder for shooting Trayvon, who was unarmed, after calling police and describing him as suspicious.
The day's events began in front of the Seminole County Courthouse with family members and supporters singing "Happy Birthday" to Trayvon, who would have turned 18 today.
The legal arguments began at 9 a.m. Defense attorney Mark O'Mara acknowledged the teen's birthday at the start of the hearing, stating that "no matter what, a tragedy occurred."
Next up, O'Mara asked the judge to grant the defense access to purchase records from a 7-Eleven where Trayvon shopped the night of the shooting. The state did not object, and the judge granted the motion.
"The only additional argument is I need more time," O'Mara said in court today.
Prosecutor Bernie de la Rionda says O'Mara doesn't deserve any more time.
"It's February and the trial's set for June," he said, adding that some delays that have happened so far have been the defense's fault.
"Sometimes we set aside days of depositions, and they're canceled.. that's frustrating," de la Rionda said.
The judge noted that both parties had earlier estimated they would be ready by June. O'Mara's issues, the Circuit Judge Debra Nelson said, don't appear to be "insurmountable."
The parties then moved on to other pieces of evidence O'Mara argues he needs.
The attorneys argued about data downloaded from Trayvon's phone. O'Mara has said there's information the state is withholding.
Nelson told the state to provide a full chain of custody report for the phone, indicating which tests were conducted where.
O'Mara also asked the judge to order the state to provide further information on the social media accounts of Witness 8.
She's expected to be one of the state's most important witnesses because she says she heard the first words of the confrontation between Trayvon and Zimmerman.
The judge ruled that the defense can get the social media information through a "mini" deposition, before the witness is formally deposed.
Once the hearing is over, there'll be another rally. At 2 p.m. two groups that were at odds in the days immediately following Trayvon's shooting – Sanford police and the NAACP – are among the sponsors of a peace and anti-gun violence rally in Goldsboro, an historically black Sanford neighborhood.
Sanford's mayor, city manager, plus attorneys for Trayvon's family are to speak. So are community leaders.