By Law, ALL DOGS must have a current rabies vaccination and be licensed by April 30 every year! 

NH RSA 466:1 Procuring License; Tag. – Every owner or keeper of a dog 4 months old or over shall annually, cause it to be registered, numbered, described, and licensed for one year in the office of the clerk of the city or town in which the dog is kept, and shall cause it to wear around its neck a collar to which shall be attached a metal tag with the following information thereon: the name of the city or town, year of issue of license and its registered number. The tag and license shall be furnished by the clerk at the expense of the city or town. Regardless of when the license is obtained, the license shall be effective from May 1 of each year to April 30 of the subsequent year.