Yes, as long as you haven't bred the espeon (i.e the eevee before you evolved it) from the same ditto and another eevee or eevee-lution.
you can make a baby eevee by leaving it with ditto, leafeon, glaceon, jolteon, flareon, vaporean, espeon, or umbreon
Make Eevee as happy as you can. For Umbreon, level it up at night. For Espeon, level Eevee up in the day.
It needs to be after 8:00pm, so make sure it's actually that time first. If not, it may that Eevee's evolution gets determined by the first time it tries to evolve, meaning that you may be stuck with an Espeon. (I'm not certain, so if someone could could confirm that, that would be great) You could just breed a new Eevee using a ditto and the Espeon (if you don't have a ditto other Pokemon work too (Pikachu is one of them)
Eevee can only be bred by a Ditto or another Eevee. Make sure you have an Eevee of the opposite gender. You can catch any Ditto to breed with. Make sure the Ditto gets along well with Eevee, however.
in the morning, after 8:00, you evolve eevee into espeon, at night, after 8:00, it evoles into umbreon (make sure eevee likes you alot)
When Eevee loves you, level it up in the Morning.
In Pokémon Flora Sky, to evolve Eevee into Espeon, you need to level up Eevee while it has high friendship with you. Make sure Eevee's friendship level is at least 220, and then level it up during the day. After meeting these conditions, Eevee will evolve into Espeon.
it make an eevee evolve into espeon Your Welcome
give it a water stone
You can't make eevee evolve into espeon by leveling it up. You have to give it a certain stone. I think it might be a moonstone, but maybe that makes eevee evolve into umbreon.
If you want Eevee to evolve into Espeon then train it during the day, other way 'round for umbreon (On LGFR you need the National Dex)
depends on happiness espeon during the day umbreon at night