Uber riders have left behind a slew of bizarre possessions in cars, including a set of Nordic poles, a sweet-potato care package, the anti-anxiety drug Valium — and a lobster, according to an index of items released by the company this week.

Other oddities found in rides across North America include a chair, a smoke machine, paintings, a paycheck, a grill set and a volume of Fyodor Dostoyevsky’s novel “Crime and Punishment.”

Los Angeles was ranked the “most forgetful” North American city and the Big Apple came in second, Uber said. San Francisco, Chicago and Miami rounded out the top five.

Sunday was the most common day for riders to report missing items and also the day that Uber had the most reports of missing wedding dresses.

On Mondays, riders commonly left behind skateboards. On Tuesdays, they most often forgot their swimsuits. Wednesday passengers left behind a lot of notebooks, and on Thursdays: suitcases. Friday Uber riders most commonly forgot their briefcases, and Saturday passengers forgot to hold onto their plane tickets.

The most commonly forgotten items were the basics — phones, keys, wallets and eyeglasses, to name a few.

October 30 was ranked the “most forgetful” day of 2016. Dec. 11 was No. 2.

Missing something right now?

Uberinos who leave items behind can go to the menu page on their app and tap “Help,” followed by “Report an issue with this trip.”

After that, press “I lost an item,” followed by “Contact my driver about a lost item.”

Passengers will then be prompted for their phone number, allowing drivers to link up with them.