Graham Downing
The season for shooting Canada geese is the same as for other species of wildfowl: from 1 September to 31 January above the high water mark of ordinary spring tides, and to 20 February below the high water mark of ordinary spring tides.

However, General Licences issued by the national conservation authorities permit Canada geese to be killed or taken at any time of the year to prevent serious damage to livestock or crops, to prevent disease and, in some cases, to preserve public health or safety.

If you are relying on a General Licence, then you should first check the licence online, as details vary between counties, and you must comply with licence requirements.