Hillary Clinton’s campaign didn’t pick the best time to stage a major campaign rally at Four Freedoms Park on Roosevelt Island later this month.

According to the park’s website, a specially planned event for tots called Imagination Playground — which features unique blue building blocks — has been canceled to accommodate the Democratic front-runner for president.

Also at risk of major inconvenience: an annual celebration called Roosevelt Island Day, which features a blood drive, hot dog stands and free rides for kids.

“It’s going to be horrendous logistically,” said Sherie Helstien, vice president of the island’s community association, who noted that her community has just one main road.

“I think the campaign should have reached out to the community representatives of 14,000 people — absolutely,” fumed Matthew Katz, former president of the association, and husband of Helstien.

He says residents received no notice from the Clinton camp.

“We are not just a memorial and a park. We’re a thriving community of 14,000 people. It’s just tone-deaf to ignore that,” he added.

Katz, who voted for Clinton and even knocked on doors for her in Pennsylvania, said he was concerned that added security could harm the 18th annual island festival, which has been in the works for months.

Volunteers have been signing up blood donors every Saturday in a tradition that began after 9/11. The drive itself will be held at a senior center on June 13, the same day as Clinton’s rally.

“We would hope this would not impact the kind of participation we have for what we’re doing,” Katz said. “This seems to be for a political campaign sort of not particularly savvy in terms of the purpose of the thing — kind of tone-deaf actually,” he continued.

“So we’re hoping that we can, through our local politicians, persuade the campaign perhaps to spend a little time with people. That would be nice.”

Adding to the security headaches: President Bill Clinton will be joining his wife.

“I understand that he will be there,” said Sally Minard, president of the Four Freedoms Park Conservancy, which has been working with the campaign on the logistics.

She promised to reschedule the Imagination Playground event.

“We’ll definitely put it on a different weekend,” Minard said. “People just love it.”