As a product manager, you can’t avoid dates completely. There will always be external pressures on you to deliver.
Often, though, it’s because your stakeholders don’t understand what you’re trying to achieve.
Use your roadmap to contextualise your current, near-term and long-term objectives in a way that gives everyone confidence you’re on the right path.
And save the dates for the work you’ve committed to delivering in the next one or two release cycles.
Anything more than that is fantasy.