Celebrate Earth Day on Friday and throughout the weekend with these different events in the city.

Although fall in Boston may look a little different this year, there are still many things to do while staying safe.

Swaying in colorful unison, 20 large nylon daffodils flutter over the Seaport Common to celebrate the Boston Marathon and welcome the emergence of spring. Designed by artist Daniele Frazier, the art project “20 Knots: Daffodils for Boston” opened April 8 and runs through the end of the month.