I disagree. While yes, its definitely "safer" to leave wood for a year, you can have it dry in much less time.
Rough it out, get it bending at floor tiller a few inches. Put it somewhere in the house where the humidity is low.
Leave it for a month or so. Then check the floor tiller. If it feels somewhat spongey, leave it to dry more. If it responds well, or feels a bit snappier at floor tiller now, then you can try long stringing it. If it takes any set during the bending under 10 inches of draw, it is still too wet.
I'd say if you do it correctly, you can have a safely dried bow under 2 or 3 months for sure and for certain.
Definitely take advantage of the hickory while its green though whether you will season it for a year or 3 months though. It is much easier to chop away all that extra wood now rather than when it is dry.