In accordance with embodiments of the present disclosure, an information handling system may include a processor, an access controller, a real-time clock, and a basic input/output system. The access controller may be communicatively coupled to the processor and configured to execute a client for retrieving real time via a network communicatively coupled to the access controller. The real-time clock may be communicatively coupled to the access controller. The basic input/output system may be embodied in one or more instructions readable and executable by the processor and configured to, during a power-on/self-test of the basic input/output system, read real time from the access controller and write the real time to the real-time clock.