Understanding when different age groups rely on ride-hailing services helps platforms and drivers allocate resources more effectively, and allows advertisers to time in-app promotions for maximum visibility. Ride-hailing providers in Vietnam can use peak-hour data to optimize driver supply, reduce wait times, and tailor pricing strategies to each demographic. Across all age groups, demand concentrates around commute windows and daytime hours, with late-night usage remaining consistently low. Overall, age plays a strong role in shaping when Vietnamese riders choose to book a trip.