No wonder presidential candidate Bill de Blasio needs more time to disclose his personal finances to the Federal Elections Committee. After all, Mayor Bill de Blasio has a lot of responsibilities to New York City . . . and ignoring them all must be exhausting.

The FEC granted de Blasio’s request for 45 more days to file the report. Guess the DC-based agency doesn’t know enough to laugh down his claim to be too busy with his “substantial duties” at City Hall.

Hah! In just the past month, he’s skipped the dedication of a memorial for 9/11 first responders, all D-Day commemoration events and the National Puerto Rican Day Parade.

Instead, he’s been off to Iowa, New Hampshire, Nevada and South Carolina — where he headed again on Thursday night.

Even though his White House bid is utterly hopeless, he’s bent on the chase anyway — because, by all accounts, he’s grown to hate his boring job back here in the city.

And all the local pols know it: Members of the City Council all but bragged about how de Blasio’s presidential distractions made it easy to muscle him into giving way on the new budget; lawmakers up in Albany barely pretend to pay attention to the mayor’s lectures.

If the FEC weren’t utterly clueless, de Blasio would’ve been better off claiming that the dog ate his paperwork.