Given the following context:

The village symbol is the Briarcliff Rose, a more brightly colored offshoot of the American Beauty rose. Since 2006, the Briarcliff Rose has been used on village street signs. The Briarcliff Manor Garden Club, which also uses the Briarcliff rose as their symbol, was established in 1956. One of its primary functions is in planting, maintaining, and improving public gardens and grounds.Briarcliff Manor has groups in several Scouting organizations, including Cub Scout Pack 6 and Boy Scout Troop 18. Pack 6 became the first Cub Scout pack in the village at its establishment in 1968; by 2002 it had over 70 cubs in 12 dens. The village's first Boy Scout troop was Troop 1 Briarcliff, founded before 1919. Sources cite Bill Buffman as the first Scoutmaster and John Hersey as the troop's first Eagle Scout. The first Girl Scout troop in the village was founded in 1917 by Louise Miller and Mrs. Alfred Jones, and the first Brownie troop was founded in 1929.The Briarcliff Manor Community Bonfire is a winter holiday event at Law Park, hosted by the village and the Briarcliff Friends of the Arts, involving live music (primarily seasonal and holiday songs), refreshments, and craft projects for children. Another annual community event is the Memorial Day parade, a tradition in Briarcliff Manor for more than fifty years. Before the parade begins, the Municipal Building's bell is rung to commemorate firefighters who have died in the previous year; the parade ends at the village's war memorial in Law Park, where wreaths are laid on the monument. The holiday has been celebrated in the village since the early 1900s, though initially involving large family picnics, with parades reserved for the Fourth of July.

answer the following question:

What is the name of the holiday that has been celebrated in the village since the early 1900s, though it initially only involved large family picnics? 

Memorial Day