...or maybe that's "LEAF"...

You can rake leaves any time, but if you want to use a leaf blower (the noisy power kind) you must follow the Cambridge City Council’s NEW ordinance which applies to all residents, businesses, property owners, and Gnomes. (Some large property owners may be eligible for some exemptions.)

This means you have to wait till March 15th.
You are only allowed to blow leaves between March 15 and June 15 and then again between
September 15 and December 31 only between these hours:

• Monday – Friday: 8:00 a.m. – 5:00 p.m.
• Saturday: 9:00 a.m. – 5:00 p.m.
• Columbus Day: 12 noon – 5:00 p.m.
• Veteran’s Day: 1:00 p.m. – 5:00 p.m.

You are NOT allowed to blow leaves between January 1 – March 14; and
June 16 – September 14; AND not allowed to blow leaves on any Sundays or Legal holidays, except for Columbus Day and Veterans Day read more...