The best day for email open rates depends on your audience. Research shows Tuesday often has the highest open rates. Wednesday and Thursday also perform well for many businesses. Mondays can work for some, but people may feel overwhelmed by emails. Fridays often have lower open rates as people focus on the weekend. Weekends usually show the lowest open rates in most cases. You should analyze your audience to find what works. You should Testing different days will help you choose the best one. A good timing strategy increases your chances of success. Always monitor results to adjust your schedule as needed.