When setting up a training plan, can't set a race date sooner than the suggested date range, even in create your own race. Just finished 10k training/race and want to transition directly to half marathon for a race in May. Won't let me pick before

When setting up a training plan, I can't set a race date sooner than the suggested date range, even in "create your own race."  I just finished a 10k training Strava plan/race and want to transition directly to a half marathon plan for a race in May. The plan won't let me select a date before June. Would be great if it could advance me in the plan based on current activity/fitness level in order to accommodate a nearby race date, the way Strava does.