A team of physicists with NASA's Jet Propulsion Laboratory at the California Institute of Technology has calculated more precisely how much faster time passes on the moon than on the Earth. The paper describing the math they used to make the calculations and their results has been posted to the arXiv preprint server.
Yeah, 274 years is such a weird time length to use. 0.02 seconds per year is better, or if you wanted to do a “lifetime” measurement it’s about 1.68s over 80 years.