I would like to suggest adding the ability to set start and end dates for dynamic training plans, with an option for plans to remain ongoing if needed.

This feature would be especially helpful for scenarios where athletes transition between dynamic plans. For example, I often have athletes training for one event, such as an Olympic triathlon, who then move to a different plan, like training for a 70.3. Currently, when I remove the Olympic plan from their account, all uncompleted workouts are lost.

Additionally, it would be helpful to set a future start date for a new plan. For instance, if I want to apply a 70.3 training plan but have it begin the following Monday, I could prepare everything in advance (e.g., on the Wednesday before). This would allow athletes to see upcoming workouts without disrupting their current schedule.

Adding date functionality would also resolve the issue, mentioned in another request, of athletes losing uncompleted workouts when transitioning plans.