Each year, there's a theme for the day and 2021's theme is 'Science for and with society'. the Director-General of UNESCO, Audrey Azoulay, had this to say about World Science Day:
Open Science seeks to make scientific information, knowledge and data available to all. By increasing access to information, it aims at giving all scientists, innovators, engineers, entrepreneurs and citizens the opportunity to observe, contribute and create knowledge in the fields of science, technology and innovation. Not only does this approach boost transparency and accountability, it helps to create equal opportunities for all, by encouraging engagement with scientific culture.
What are the objectives for World Science Day?
UNESCO has set out 4 key objectives for World Science Day:

Strengthen public awareness on the role of science for peaceful and sustainable societies.

Promote national and international solidarity for shared science between countries.

Renew national and international commitment for the use of science for the benefit of society.

Draw attention to the challenges faced by science and raise support for the scientific endeavor.
Open Science seeks to make scientific information, knowledge and data available to all. By increasing access to information, it aims at giving all scientists, innovators, engineers, entrepreneurs and citizens the opportunity to observe, contribute and create knowledge in the fields of science, technology and innovation. Not only does this approach boost transparency and accountability, it helps to create equal opportunities for all, by encouraging engagement with scientific culture.
What are the objectives for World Science Day?
UNESCO has set out 4 key objectives for World Science Day: