Millions of Americans, including those in Wisconsin, are preparing to celebrate the New Year with family and friends.

For those still preparing for the holidays, there are several grocery stores that will remain open on New Year’s Eve, including Costco locations. Here’s what you should know about Costco warehouses on New Year’s Eve and New Year’s Day.

When do Costco stores open and close on December 31st?

If you need to pick up some last-minute party supplies, Costco is an option for you this year, as the company’s warehouses are open from 9 a.m. to 6 p.m. on New Year’s Eve.

Are Costco stores open on New Year’s Day?

According to the company’s website, the warehouses will close on January 1st.

Which grocery stores are open on New Year’s Eve and New Year’s Day in Wisconsin?

• Pick ‘n Save: Open New Year’s Eve and New Year’s Day

• Metro Market: Open on New Year’s Eve and New Year’s Day

• Trader Joe’s: Open until 5 p.m. on New Year’s Eve but closed on New Year’s Day

• Aldi: Limited opening hours on New Year’s Eve and closed New Year’s Day

• Woodman’s Markets: Closed at 7:45 p.m. on New Year’s Eve and open at 9 a.m. on New Year’s Day

• Metcalfe’s Markets: Open 6:00 a.m. to 10:00 p.m. on New Year’s Eve and New Year’s Day

• Outpost Natural Foods: Open New Year’s Eve 7:30 a.m. to 6 p.m. and New Year’s Day 9 a.m. to 6 p.m

RATED: These Wisconsin grocery stores are open on New Year’s Eve and New Year’s Day

Where are Costco locations in Wisconsin?

For a list of Costco locations in Wisconsin, visit the website. Here are some locations in suburban Milwaukee:

• Pewaukee: 443 Pewaukee Road

• Grafton: 950 Port Washington Road

• Menomonee Falls: W162N9235 Pershing Ave.

• New Berlin: 15300 W. Grange Ave.

RELATED: A fireworks display is planned for New Year’s Eve in downtown Milwaukee. What you should know.

This article originally appeared in the Milwaukee Journal Sentinel: Is Costco open on New Year’s Eve in Wisconsin? Opening times, locations