How about:

Spring has Arrived!

bahar geldi

or

bahar vardı

Is gelmek or varmak better in this case? Can the ´has´ somehow be part of this?

bahar geldi

bahar vardı - something like "ït was spring"

lets wait a native to explain more exactly

Varmak mean to arrive while gelmek mean to come. i think it´s correct bahar geldi like gabriela said. Var show excistance of something.

it was spring=bahardı (Bahar vardı is not correct in this situation) 

Evimizde hep bahar var (in this sentence it´s correct to use var)

this is my opinion.

Edited (4/24/2014) by denizli

Is this OK? Bahar var?

Yes, we say  " Bahar geldi " = Spring has arrived.

I found this on google

Bir Bahar Vardı

The way it´s used in the poem is different. The first line would translate as:

"There was a spring which told your tale to me"

I know....but all I wanted to say is - it could be "bahar vardi"...but only methaphorically