April 19 is observed as;

International No Diet Day (INDD) was observed on May 6 to promote a healthy lifestyle and raise awareness of the dangers and futility of dieting. The day also aims to raise awareness about the various dieting disorders which exist such as anorexia and bulimia. The INDD symbol is a blue ribbon. The INDD was first created in 1992 by Mary Evans Young to help people appreciate their own bodies. British feminist Mary was an anorexia patient(an eating disorder). She is the director of the British group "Diet Breakers" among the weight issues. The main agenda of INDD is Educating people on how to diet effectively and responsibly to improve healthy life and raise awareness about fatphobia, weight discrimination, sizism and potential dangers of commercial diet plans, honoring the victims of weight-loss surgery and eating disorders, promoting body acceptance and body shape diversity.

The International Nurses Day was celebrated globally to commemorate the birth anniversary of Florence Nightingale also known as 'The Lady with the Lamp', was famous as manager and trainer of nurses during the Crimean War. The theme for the International Nurses Day 2019 is -'Nurses - A Voice to Lead -Health for All'. In 1860, Nightingale laid the foundation of professional nursing with the establishment of "Nightingale School of Nursing" at St Thomas' Hospital in London. It was the first secular nursing school in the world and is now part of King's College London.The Florence Nightingale Medal is the highest international distinction a nurse can achieve.

The Registrar of National Day Calendar has designated the first Thursday of May of each year as World Password Day. World Password Day is a celebration to promote better password habits. Passwords are critical gatekeepers to our digital identities, allowing us to access online shopping, dating, banking, social media, private work and life communications.

3rd May is observed worldwide as International Energy Day by The International Energy Agency (IEA).IEA is an autonomous inter-governmental organization based in Paris. It was founded in the framework of the Organisation for Economic Co-operation and Development (OECD) in 1974 after the 1973 oil crisis.The agency works as a policy adviser to its member states and also works with non-member nations like China, India, and Russia.IEA's main focus lies in the "3Es" of effective energy policy.

World Book Day is celebrated every year on 23 April. It is also known as World Book and Copyright Day, or International Day of the Book. It is organized by the United Nations Educational, Scientific and Cultural Organization (UNESCO) to promote reading, publishing, and copyright. It was first celebrated on 23 April 1995. For the year 2019, Sharjah, UAE has been declared as the World Book Capital. It will be preceded by Kuala Lumpur, Malaysia in the year 2020.

The United Nations' (UN) International day of Sport for Development and Peace(IDSDP) is observed annually on April 6 to recognize the power of sport in promoting peace and erasing cultural barriers worldwide.It is celebrated to promote healthy lifestyles and emphasizes the international Olympic Committee focus on giving as possible access to sport.The day is an annual celebration of the power of sport to drive social change, community development and to foster peace and understanding.April 6 was declared as the IDSDP by United Nations in 2013 and has been celebrated each year ever since 2014.

World Day for Safety and Health at Work is a UN international day that is celebrated every April 28. It is an annual international campaign to promote safe, healthy and decent work. It has been observed by the International Labour Organization (ILO) since 2003. It is concerned about safe work and awareness of the dimensions and consequences of work-related accidents and diseases; to place occupational safety and health (OSH) on the international and national agendas, and to provide support to the national efforts for the improvement of national OSH systems and programmes in line with relevant international labour standards. Inspired by the ILO centenary and discussions on the future of work, the world day this year attempts to take stock of a 100 years of work in improving occupational safety and health and looks to the future for continuing these efforts through major changes such as technology, demographics, sustainable development including climate change and changes in work organization.

Bihar Diwas or Bihar Day is celebrated every year on 22 March to commemorate the state's separation from Bengal presidency in 1912. This day is a public holiday in Bihar. This day marks the 107th foundation day of Bihar.

The World Creativity and Innovation Day was observed to encourage people to use creativity in problem-solving for all issues related to achieving the 2015 Sustainable Development Goals. the United Nations (UN) recognized 21st April as an official World Creativity and Innovation Day and 2018 marks the first year the UN was observed WCID. The day was first commemorated in over 50 countries around the world on 21st April 2002. In 2006, this day became a week starting from 15th April, which is Leonardo Davinci's birthday; an icon of cross-disciplinary creativity in the arts and sciences.

World Meteorological Day is observed annually on March 23 to commemorate the establishment of the World Meteorological Organization (WMO) in 1950. The day also underlines the efforts of National Meteorological and Hydrological Services for the safety and well-being of society. The theme 2019 was "The Sun, the Earth and the Weather". The day was first observed in 1961.