In Portugal, the holiday known as the Assumption of Mary, also known as Assunção de Nossa Senhora, is celebrated with great zeal and passion. This is a national holiday observed by the Roman Catholic community marking the belief in the Virgin Mary’s ascension into heaven after her death. Observed annually on August 15, the holiday coincides with summer's peak, when Portuguese natives and visitors alike enjoy the country's warm, coastal climate, and partake in various festivities.

During the Assumption of Mary, churches across the country hold special masses and processions in honor of the Virgin Mary. Towns and cities are often adorned with decorations and vibrant displays of faith and devotion to Mary. Certain regions like Estremoz even hold spectacular processions offering locals and tourists a glimpse into Portugal's rich religious culture and tradition. The ceremony often ends with public feasting, music, dancing and other cultural activities making the day a lively and festive affair.

Aside from religious observances, the day is also seen as a significant social and family holiday. It is an opportunity for Portuguese families to get together, for meals and shared activities. Those who live on the coast often spend the day at the beach, while others in rural areas might take part in local fairs and festivals. Despite its primarily religious nature, the holiday takes on a broad scope of celebration underlining Portugal's respect for tradition, community, and cultural continuity.