  We prove the existence of non-equilibrium phases of matter in the prethermal
regime of periodically-driven, long-range interacting systems, with power-law
exponent $\alpha > d$, where $d$ is the dimensionality of the system. In this
context, we predict the existence of a disorder-free, prethermal discrete time
crystal in one dimension -- a phase strictly forbidden in the absence of
long-range interactions. Finally, using a combination of analytic and numerical
methods, we highlight key experimentally observable differences between such a
prethermal time crystal and its many-body localized counterpart.
