  Effective Field Theory calculations used in countless phenomenological
analyses employ dimensional regularization, and at intermediate stages of
computations, the operator bases extend beyond the four-dimensional ones. The
extra pieces -- the evanescent operators -- can ultimately be removed with a
suitable renormalization scheme, resulting in a finite shift of the physical
operators. Modern Effective Field Theory matching techniques relying on the
method of expansion by regions have to be extended to account for this. After
illustrating the importance of these shifts in two specific examples, we
compute the finite shifts required to remove all evanescent operators appearing
in the one-loop matching of generic ultraviolet theories to the Standard Model
Effective Field Theory and elucidate the formalism for generic Effective Field
Theory calculations.
