It was impossible to know the specific year and location, but Hao Ren could still roughly deduce the "landing spot" of his retrospective journey from the surrounding architecture and Vivian's handwritten record. If Hao Ren had guessed it right, Lily and he should now be somewhere between the fourteenth and sixteenth centuries. Based on the accent of the passers-by, they were likely in France, though he could not make out which city.
However, knowing the approximate year was good enough. At least Hao Ren could decide what identity to use as a disguise: a stalker demon hunter hidden amongst human society.