The Official Online RBS 6 Nations Store is open. The store has everything you need to get behind your team during the RBS 6 Nations, plus the store is now fully stocked with a much wider range of rugby merchandise.
The 47-capped Scotland number ten, who has been with the Warriors since 2003, has finished the Glasgow top-scorer in each of the last six seasons.
Cardiff Blues' director of rugby David Young said: "We are obviously aware of Dan's qualities as an outside-half from numerous encounters with Glasgow over the years.
"He is a quality player who has often been the difference between the two teams and a real thorn in our side on a number of occasions.
Australian-born Parks added: "I'm not moving club simply for a change but to win trophies. I feel the Blues are capable of that.
"But my full focus will remain with Glasgow until the end of the season."