How many times does Eevee evolve

Seven.
Eevee evolves INTO Vaporeon using a Water stone.
Eevee evolves INTO Flareon using a Fire stone.
Eevee evolves INTO Jolteon using a Thunder stone.
Eevee evolves INTO Espeon when it reaches full happiness in the Daytime
Eevee evolves INTO Umbreon when it reaches full happiness in the Nighttime
Eevee evolves INTO Leafeon near the rock in Eterna Forest
Eevee evolves INTO Glaceon near the rock in Route 217