It is very evident that Canaries need a certain amount of daylight hours in order to breed and lay fertile eggs.  Most Canaries will lay fertile eggs when they are exposed to between 13 hours and 14.5 hours of daylight per day.
Below is a chart that will guide you when setting up your breeding room. Gradually increase your daylight hours in order to bring your Canaries into breeding condition.

Jan 1 - 12.5 hours of light
Jan 15 - 13 hours of light
Feb 1 - 13.5 hours of light
Feb 15 - 14 hours of light
March 1 - 14.5 hours of light
March 15 - 15.0 hours of light (Maxiumum Exposure)
April 1 - 14.5 hours of light
April 15 - 14 hours of light
May 1 - 13.5 hours of light
May 15 - 13.0 hours of light
June 1 - 12.5 hours of light
June 15 - 12.0 hours of light
July 1 - 11.5 hours of light
July 15 - 11.0 hours of light
August 1 - 10.5 hours of light
August 15 - 10.0 hours of light
Sept 1 - 9.5 hours of light
Sept 15 - 9.0 hours of light (Minimum Exposure)
Oct 1 - 9.5 hours of light
Oct 15 - 10.0 hours of light
Nov 1 - 10.5 hours of light
Nov 15 - 11.0 hours of light
Dec 1 - 11.5 hours of light
Dec 15 - 12.0 hours of light