zealand road

When is Zealand Road scheduled to be open to the public?

There's no schedule per se. It opens whenever the USFS decides that the frost is totally out of the ground and the now-soft road conditions can support vehicular weight. They 1) don't want you getting stuck in the mud and 2) don't want the road chewed up and in need of repair, not necessarily in that order. Even blacktop state roads up here are posted against heavy vehicles at this time. I'd guess mid-May, given current conditions although if the heavy rain returns this week and continues, even later.
P.S. It's open as far in as the Sugarloaf trailhead, where the pavement ends and dirt starts.

The gate is open at Route 302 as of 4/27

The gate at 302 is Open YES... BUT.. BUT... the road is closed starting at the bridge the crosses over to where the road turns to dirt. Maybe a half mile up.