The Poson Poya is the most venerated day for the devout Buddhists of Sri Lanka as it marks the arrival of Arahat Mahinda Thero carrying the noble teachings of the Buddha.

World Environment Day is celebrated annually on 5 June and is the United Nations' principal vehicle for encouraging awareness and action for the protection of the environment.

World Food Safety Day is June 7. The United Nations has declared this day to draw global attention to the health consequences of contaminated food and water.

Today(June 8) is World Brain Tumour Day each year. Watch @BrainTumourFdn for a special awareness-raising social media activity. The “Deutsche Hirntumorhilfe e.V.” (German Brain Tumor Association) started this international commemoration day in the year 2000 as a tribute to all brain tumour patients and their families.

Father's Day is commemorated in most parts of the world on the third Sunday of June. This year it is being observed on June 19. Father's Day is a celebration of fathers, honouring fatherhood, paternal bonds and the role fathers play in society

The International Day of Yoga has been celebrated annually on 21 June since 2015, following its inception in the United Nations General Assembly in 2014. Yoga is a physical, mental and spiritual practice which originated in India.

Eid al-Adha is the latter of the two official holidays which are celebrated within Islam. It honors the willingness of Ibrahim to sacrifice his son Ismael as an act of obedience to God's command.