  We observe that space- and time-crystallization effects in multicomponent
superfluids---while having the same physical origin and mathematical
description as in the single-component case---are conceptually much more
straightforward. Specifically, the values of the temporal and spatial periods
are absolute rather than relative, and the broken translation symmetry in space
and/or time can be revealed with experiments involving only one equilibrium
sample. We discuss two realistic setups---one with cold atoms and another one
with bilayer superconductors---for observation of space and time
crystallization in two-component counterflow superfluids.
