Martyrs' Day, also known as 'Arzarni Day', is an annual public holiday in Myanmar (Burma). Celebrated on July 19th, it pays tribute to the assassination of Aung San - the country's modern founder - and several other cabinet members in 1947. This event, occurring just six months before Myanmar gained independence from Britain, greatly impacted the country's political trajectory. Every year, Burmese people commemorate their national heroes, recognising their sacrifice in the struggle for independence from colonial rule.

The day's principal ceremonies are held at the Martyrs' Mausoleum located on the northern part of Shwedagon Pagoda in Yangon. High-profile figures such as politicians and military officials, as well as the general public, attend the commemorative event. Speeches are given by prominent figures and families of the deceased. At 10:37 am, the exact time the assassinations occurred, a moment of silence is observed. Flowers and wreaths are also laid at the Mausoleum.

While the main focus of Martyrs' Day is the central ceremony, various activities take place around the country including art and photo exhibits, film screenings, and memorial concerts. This day is also an opportunity for families to educate younger generations about their country's history and the importance of these national heroes. Despite Myanmar's ongoing changes and challenges, Martyrs' Day continues to underscore the significance of freedom, bravery, and national unity.