AS one of the people who worked on formuating the initial route of the Wolds Way, the issue of timing was never a consideration. Access to the countryside was far less available in those distant times and the idea was to promote healthy outdoor recreation. Any artificial limitations on National Trails have been promoted totally unofficial by individuals who have no official support. Go out and enjoy them as you wish. They are there to do over as long or as short a period as you will enjoy.
This does not apply, of course, on privately created walks or challenge walks such as the Lyke Wake.