Gov. Cuomo led a public open house at the 96th Street station of the Second Avenue Subway on Thursday — saying it will be entirely his fault if it doesn’t open on time.

“If it’s late, it’s my fault,” said Cuomo. “If the trains don’t run on Jan 1, blame me. I would have failed.”

Cuomo and MTA Chairman Tom Prendergast spoke before the large crowd of Upper East Side residents and then led a tour of the massive station.

“We have been working around the clock to meet this challenge,” Prendergast said. “We’re thrilled to start the new year with a new subway line and invite all New Yorkers to come get a preview this week.”

The station was open for two hours on Thursday. It will be open from 8 a.m. to 10 a.m. and again from 5 p.m. to 7 p.m. on Friday, although there are no trains running yet.