Brian Appel, co-founder of Boston Calling, is scheduled to appear before the Mayor's Office of Consumer Affairs and Licensing on March 12 to seek licenses for both the already announced May 23-25 music festival on City Hall Plaza and for a second weekend of music Sept. 5-7, also on City Hall Plaza.

The application does not specify band names.

The hearing starts at 10 a.m. in the office's eighth-floor hearing room in City Hall.