"celebration activities" is correct and usable in written English.
You could use it to refer to activities that are or may be a part of a celebration, such as birthday parties or holidays. For example, "We've started planning some fun celebration activities for the Fourth of July!".
Outdoors DOBBS FERRY Waterfront Park on the Hudson River Hudson Riverr Quadricentennial Celebration," activities and music to celebrate Dobbs Ferry's role in the development of the Hudson River.
In recent years, the celebration activities of various folk-custom festivals have been getting more and more attention from the citizens in Taiwan.
The Grammy Museum in Los Angeles started fifth-anniversary celebration activities Monday with a gala concert, dinner and auction that added more than $500,000 to the museum's coffers to continue supporting educational and other programs.
This pilot study was promoted especially during February 2004, Black History month, as celebration activities were already in place at most of the participating churches.
SCARSDALE Greenburgh Nature Center Earth Day Celebration, nature activities.
That was the case with many of the New Yorkers who stumbled on the celebration's activities.
WEST HARTFORD Noah Webster House and West Hartford Historical Society May Day celebration, including activities for children and families.
Join Frankie, Dina and Sammie (L.I.C.M.'s own "rat pack") for a rat-themed birthday celebration with activities, decorations and a birthday cake.
Apple Day, held on 21 October, is an annual celebration with activities up and down the land and Abundance schemes in towns including Edinburgh and Sheffield see volunteers collect windfall apples from streets, gardens and public parks for redistribution.
Alex Garcia grew up in Glendale and decided to bring his family to the park, not knowing about the celebration and activities in store for his three children.
The City of Darebin and City of Yarra both voted to not host official council celebrations or activities on the January 26 out of respect for Aboriginal and Torres Strait Islander people.
