Considering calendar shows canceled for 4 weeks starting March 16 and the a week of Easter break, think it is due to Coronavirus. The military has been cautious about virus containment and lawyers requently commute to and from Guantanamo during the week. Likely just cleared the schedule.
More concerning is the KSM trial does begin tilll Jan 2021. This is a prime example that the prior occupier of our White House denied justice to the American people and favored protecting his muslim brother.
KSM wiki page:
https://en.wikipedia.org/wiki/Khalid_Sheikh_Mohammed
Mohammed was captured on March 1, 2003, in the Pakistani city of Rawalpindi by a combined operation of the US Central Intelligence Agency (CIA) and Pakistan's Inter-Services Intelligence (ISI). Immediately after his capture, Mohammad was extraordinarily rendered to secret CIA prison sites in Afghanistan, then Poland, where he was interrogated by U.S. operatives. By December 2006, he had been transferred to military custody at Guantanamo Bay detention camp. In March 2007, after significant interrogations, Mohammed confessed to masterminding the September 11 attacks, the Richard Reid shoe bombing attempt to blow up an airliner, the Bali nightclub bombing in Indonesia, the 1993 World Trade Center bombing, the murder of Daniel Pearl, and various foiled attacks, as well as numerous other crimes. He was charged in February 2008 with war crimes and murder by a U.S. military commission at Guantanamo Bay detention camp which could carry the death penalty if convicted.
In 2012, a former military prosecutor criticized the proceedings as insupportable due to confessions gained under torture. A 2008 decision by the United States Supreme Court also drew into question the legality of the methods used to gain such admissions and the admissibility of such admissions as evidence in a criminal proceeding.
On August 30, 2019, a military judge set a trial date of January 11, 2021, for Mohammed's death penalty trial.