Explanation

• World Environment Day is on 5 June.
• First observed in the city of Spokane in the USA in 1974.
• Established by the UN General Assembly in 1972.
• It is also called Eco Day.

Additional information:

Theme:

• 2020: Time for Nature in Colombia
• 2021: Ecosystem restoration in Pakistan
• 2022: Only One Earth in Sweden
• 2023: Solutions to Plastic Pollution in the Ivory Coast
• 2024: Land restoration, desertification, and drought resilience in Riyadh, Saudi Arabia
• 2025: Ending plastic pollution in South Korea

Last verified on 04-06-2026

Explanation

• First World population day was celebrated in 1987.
• World population day is observed on July 11.

Additional information:

• Theme 2024: Leave no one behind, count everyone
• Theme 2025: Empowering young people to create the families they want in a fair and hopeful world.

Last verified on 01-02-2026

Explanation

• The next leap year after recent cycle is 2028.
• A leap year comes after every 4 years.
• A year divisible by 4 is usually a leap.
• It has 366 days instead of 365 days.
• The extra day is added in February (29th February).

Last verified on 01-06-2026

Explanation

International Day of Families is celebrated on 15th of May every year.

This day is being celebrated by the United Nations since 1995.

Theme 2025: Family-Oriented Policies for Sustainable Development

Theme 2026: Families, Inequalities and Child Wellbeing
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Explanation

World Thyroid Awareness Day is observed on 25 May annually. 

Thyroid: a disease

Theme 2026: Thyroid and Nutrition

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