- Number of holidays
- 26
- Day of the year
- 140
- Days left in the year
- 225
World Bee Day was established by the UN General Assembly in 2017 on the May 20, 1734 birthday of Anton Janša, the pioneering Slovenian beekeeper who standardized modern apiculture — observed to highlight that bees pollinate three-quarters of all flowering plants and one-third of the human food supply. World Metrology Day marks May 20, 1875, when 17 nations signed the Metre Convention in Paris, establishing the international system of measurement that now governs science, trade, and daily life in nearly every country on Earth. East Timor Independence Day marks May 20, 2002, when Timor-Leste became the first new sovereign state of the 21st century, gaining independence after 24 years of Indonesian occupation following Portugal’s 1975 withdrawal. National Rescue Dog Day was founded by Lisa Wiehebrink in 2010 to celebrate dogs adopted from shelters and to drive awareness of the millions still waiting for homes. A bee, a kilogram, a new flag, and a rescue dog’s brown eyes.
All Holidays On May 20
Be a Millionaire Day
Cameroon Republic Day
Clinical Trials Day
East Timor Independence Day
Eliza Doolittle Day
Flower Day
Hats for Headway
National Band Director’s Day
National Eli Day
National High Heel Day
National Juice Slush Day
National Numeracy Day UK
National Pick Strawberries Day
National Quiche Lorraine Day
National Rescue Dog Day
National Rio Day
National Streaming Day
National Women In Aerospace Day
Turn Beauty Inside Out Day
Weights and Measures Day
World Bee Day
World Metrology Day
About May 20
May 20 Q&As
What is the most popular holiday on May 20?
On May 20, World Bee Day is the most globally recognized environmental observance, established by the UN in 2017. World Metrology Day is the most significant international science observance, marking the May 20, 1875 Metre Convention, and East Timor Independence Day marks the birth of the 21st century’s first new nation.
What countries celebrate holidays on May 20?
May 20 observances span Timor-Leste (East Timor Independence Day), Cameroon (Cameroon Republic Day), Slovenia (inspiration for World Bee Day‘s date), and the U.S., which hosts National Rescue Dog Day, Clinical Trials Day, and Be a Millionaire Day. World Bee Day and World Metrology Day are observed globally.
What environmental days are on May 20?
May 20 includes World Bee Day, established by the UN in 2017 to highlight that bees pollinate one-third of the human food supply, and National Rescue Dog Day, founded in 2010 by Lisa Wiehebrink to celebrate shelter-adopted dogs.