Sourest Day 2017: When Is Sourest Day? 🗓

When is Sourest Day 2017? This year Sourest Day is celebrated on a Wednesday, October 25, 2017. In 2018, Sourest Day is on Thursday, October 25, 2018.

October 25 is Sourest Day, a day to celebrate all things sour – people or foods.

The origins of this made-up holiday are unknown, but we can assume that the day encourages people to try our sour foods and to cheer up the sour people in their lives.

Countdown to Sourest Day date is below, plus holiday history, celebration info, facts and holiday details.

When is Sourest Day 2017? This year Sourest Day is on Wednesday, October 25, 2017.


Sourness is a taste that detects acidity in a food item. Scientists rank substances on their sourness by comparing it to hydrochloric acid, which has a sourness index of 1.

Below you will find all the details for Sourest Day 2017 including, are banks open, is there mail delivery and related holiday information.

Is Sourest Day a federal holiday?

No, Sourest Day is not a federal holiday. There are ten annual US federal holidays on the calendar designated by the United States Congress. The following federal holidays are established by law:

  • New Year’s Day
  • Birthday of Martin Luther King, Jr. (Third Monday in January).
  • Washington’s Birthday (Third Monday in February)
  • Memorial Day (Last Monday in May)
  • Independence Day (July 4)
  • Labor Day (First Monday in September)
  • Columbus Day (Second Monday in October)
  • Veterans Day (November 11)
  • Thanksgiving Day (Fourth Thursday in November)
  • Christmas Day (December 25)

Is Sourest Day a national holiday?

Sourest Day is not a national holiday. Unlike many other countries, there are no ‘national holidays’ in the United States because Congress only has constitutional authority to create holidays for federal institutions. Most federal holidays are also observered as state holidays.

Is Sourest Day a paid holiday?

No, Sourest Day is not a paid holiday. The Fair Labor Standards Act (FLSA) does not require payment for time not worked, such as vacations or holidays (federal or otherwise).

Does the mail run on Sourest Day?

Yes, there will be mail delivery on Sourest Day. All post offices and federal offices of any kind will be open for the holiday, which means businesses and homes will receive mail. This also counts USPS and Fedex packages. See holiday schedule on USPS and Fedex. The only time mail is not being delivered is on federal holidays, which are listed above.

Are banks open on Sourest Day?

Sourest Day is a Fun holiday, which means all federal offices, courts and most banks will be open. While most banks are open, some banks can operate on their own schedules, so it may be best to check with your local branches. U.S. stock and bond markets like the New York Stock Exchange and NASDAQ will be open. Grocery stores and malls are reportedly open.

If your bank is closed, it is still possible to conduct general banking transactions via ATM, online banking or your mobile phone. Apps and websites are running though not all normal functions may be accessed for the holiday.

Are stores open on Sourest Day?

On Sourest Day, most stores, restaurants, shopping centers, and malls are open. There are no holidays on which all businesses are closed by law. However, some stores may have shortened or extended holiday hours for the day. Stores may be operating on holiday schedule with limited or reduced hours of operation. Some businesses may be closed on in order to give their employees the day off. For restaurants, stores and other establishments specific to your area, you will have to check with the individual business.

Shop Sourest Day Gifts on Amazon

Sourest Day 2017

Holiday: Sourest Day
Date: October 25, 2017
Weekday: Wednesday
Holiday Type: Fun
Sourest Day 2018: Thursday, October 25, 2018
Sourest Day 2019: Friday, October 25, 2019
Sourest Day 2020: Sunday, October 25, 2020

Fun Holiday Fact

Did you know …that an average adult has about 10,000 taste buds in their mouth? Taste buds reduce in number as people age.

How To Celebrate Sourest Day

Replace your daily beverages with sour beverages like limeade, buttermilk and drinking vinegar.

Have sour tasting food all day long. Have sour fruits for breakfast and for lunch have lemon chicken. For dinner make some ceviche, a grapefruit salad and a key lime pie for dessert.

Bring sour candy to work for your co-workers or make a dessert that include sour fruit or limes.

Know someone who is grumpy and grouchy? Do something nice for them to make them feel less sour.

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