Should I have different start times for different regions?

As an e-commerce business operating globally, I'm struggling to determine the best approach for launching promotional campaigns across different time zones. My customers are spread across multiple countries and continents, and I want to ensure that my marketing efforts are optimized for each region's local time and consumer behavior. I'm uncertain about whether I should synchronize all my campaigns to a single start time or create staggered, region-specific launch times that might better align with local shopping patterns and peak engagement hours.