Question: how to evolve eevee into espeon or umbreon in pokemon gold?
Answer: Level up Eevee at during the day (Espeon) or during the night (Umbreon) once you think its Friendship is at 220. Once you feel that Eevee is above 220 Friendship, level it up during the day to evolve it into Espeon, or at night to evolve it into Umbreon.