Mas a nd gravity are the obvious lconnection via newton. Einstein, linked gravity to time,
time dialation as a consequence of relativity links gravity with time and since
quantum mechanics does not accommodate gravity, and this has not detracted from quantum theory from being an effective way to describe the world on the very small scale, and considering the mass of particles such as photons and electrons is minute therefore time dilation has no consequences. But I do not think this is entirely true.