NMC is the timekeeper of Singapore Standard Time SST. Being the national time laboratory, NMC undertakes the task of generating, maintaining and disseminating the official time UTC(SG), a local realization of world standard time called coordinated universal time. The Singapore Standard Time (SST) is generated by advancing the UTC(SG) by 8 hours to account for the time zone. The UTC(SG) is derived at highest level from an ensemble of atomic clocks including one hydrogen MASER and several caesium beam frequency standards. It is disseminated to the industry by providing time & frequency related measurement standards traceable to SI units the Second. We also offer precision measurement services for user-specific systems in the area.