William Swale, 67, allegedly mounted the kerb in his SUV and hit several people seated on the front lawn of the Royal Daylesford Hotel on November 5, 2023.
Pratibha Sharma, 44, her daughter Anvi, 9, and partner Jatin Kumar, 30, and their friend Vivek Bhatia, 38, and his son Vihaan, 11, were all killed.
Police allege Swale, who was diagnosed with diabetes in 1994, ignored nine alerts from his blood glucose monitoring device in the lead-up to the Daylesford crash.
The 67-year-old was charged with 14 offences, including culpable driving causing death and negligently causing serious injury.
Swale appeared via video link at Ballarat Magistrates Court on Thursday afternoon, where a six-day committal hearing was set down for September.
Magistrate Michelle Mykytowycz initially questioned why there was such a long delay, noting the significance of the case and the clear public interest.
She said the Ballarat court could accommodate a committal hearing starting in July.
But both the prosecution and defence confirmed September 16 was the earliest all 13 witnesses would be available to give evidence at the same time.
The witnesses include at least four experts, including a digital forensics specialist.
Ms Mykytowycz allowed the delay but extended it to a six-day hearing instead of the requested three days, saying it was important the committal ended in September.
The magistrate also extended Swale's bail to the committal hearing date.
The 67-year-old remained quiet throughout Thursday's brief hearing, only thanking the magistrate at the end for extending his bail.
Swale was released on bail in December 2023 after posting a $250,000 surety to the court.
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