Blue Origin pushed again its planned debut launch of its New Glenn rocket from the Space Coast, now targeting an early Monday morning liftoff. The 321-foot-tall rocket making its debut on the NG-1 mission is targeting a three-hour window from 1-4 a.

The company, started by the Amazon founder Jeff Bezos, reset its countdown clock repeatedly over a period of just over two hours before eventually postponing the test flight to another day.

Jeff Bezos’s Blue Origin launched its New Glenn rocket into orbit early Thursday, in a critical milestone that comes some 25 years after the billionaire founded the company with the goal of reducing the cost of access to space.