Is it a sign of the times?

Someone rejiggered a giant Department of Transportation light-up billboard in Brooklyn to say “F–k Trump” — and the message stayed up for at least 12 hours.

The sign, which has been sitting on the corner of Eagle Street and McGuinness Boulevard at the foot of the Pulaski Bridge for about a week, previously warned of bridge closures. But on Thursday, it had a different message.

“I thought this was pretty funny. These signs are normally used for direction or order,” said Andrew Rappa, 24, of Greenpoint. “It’s a result of everything that’s been happening in our government.”

Marek Jablonski of Ridgewood, Queens, said that he voted for Trump, but the tax-fraud conviction of former campaign manager Paul Manafort and longtime fixer Michael Cohen’s copping to campaign finance felonies this week were the last straw — and that Trump has lost his support.

“There are no kings left,” he said, lamenting the lack of honor among members of the administration.

Another gawker balked at the display.

“If you hate him, fine — that’s your personal opinion — but that’s taking it to the extreme,” a Woodside, Queens, resident who gave his name as Anthony said of the sign. “Even though [Trump] does terrible things, it’s against the law.”

The sign was tampered with Wednesday night, according to a DOT rep, who said at it was fixed by 3 p.m. Thursday but denied any responsibility.

“This sign belongs to a contractor and was addressed,” said spokesman Scott Gastel. “It’s the contractor’s responsibility to maintain those, including repairs and clarifications.”

It’s certainly not the first time someone has fiddled with a DOT sign — someone tweaked one in Queens last October to say “North Korea is Best Korea” in an apparent reference to an online meme.