Dorchester Day 2025. Every year on the first sunday in june, residents of dorchester gather to celebrate the history of boston’s biggest and most diverse neighborhood. Check the temperatures, chance of rain and more in dorchester during april.

The first observance of dorchester day, in june of 1904, took place under a tent on savin hill. Dorchester day, marked on the first sunday in june, began in 1904 as a celebration of the founding of dorchester on savin hill in 1630 and was followed by the first parade in.