Do we have any idea when the SCOTUS ruling for Obergefell v Hodges (nationwide gay marriage case) will be handed down?

I've heard somewhere during or around June 6, but I'm having trouble sourcing that information to any point. Could anyone link me up with any info? I know it's speculative ish, but it could give me an idea of when I need to buy my bus ticket back to DC (where I attend university) to join in on the celebration.