May 17 Events

May 18 Events →

Walnut Day

Name: Walnut Day
Start: 2026-05-17T00:00:00+00:00
End: 2026-05-17
Location: US Holidays

Walnut Day is held on May 17. This event in the second decade of the month May is annual.

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99% of the commercial U.S. supply and 3/4 of the world trade of walnuts now come from California. Walnuts are the oldest known tree food — they date back to 10,000 BC! English walnuts (also known as Persian walnuts) originate in Central Asia and were introduced to California in the 1700s. California is home to nearly 325,000 acres of walnut orchards.

Walnut trees take about 5 years before they are considered productive, after which they produce an annual crop for 30 to 40 years. It takes about 170 days for a walnut to develop and mature on a tree.

Similar holidays and events, festivals and interesting facts

World Whisky Day on May 16 (Third Saturday of May);

National Barbecue Day in USA on May 16;

May Restaurant Day on May 16 (is occurs once per season. The third Saturday of February, May, August, and November);

Bread Festival in France on May 16;

National Mimosa Day in USA on May 16;

Biographers Day on May 16;

Love a Tree Day on May 16;

Sea Monkey Day on May 16 (They’re known as Artemia New York Ocean Science and go through anhydrobiosis, or hibernation when they are dried out. Then, with the right mixture of water and nutrients they can spring right back into life);