To be serious I would favour a four term school year rather than the present 3 terms. This would shorten the loooooooong summer holdiay, give more frequent holidays and get rid once and for all of the excessive charges of going on holiday during the so called "Peak Season" of July and August. Of course the something and nothing half terms would be cut and included into the extra holiday created. As added benefits, particularly to those of us who live in holiday destinations, income would be more evenly spread throughout the year, traffic flow would be more equally spread over the months and such a move would end the arguments about taking the kids out of school during term time as it is the only time some parents can get holidays from work. Not that this latter really applies to me since both boys are home educated.
There is a fair chance the weather might be better during some of the holiday periods too.