The 2-3 PM window timing is not arbitrary. Pacific Time 2-3 PM corresponds to: 5-6 PM Eastern (end of East Coast workday, people check messages before leaving), 10-11 PM UK (evening browsing), and 7-8 AM next day Australia (morning check). For Substack users, afternoon Pacific Time is when many professionals do a final daily check of their subscribed publications. The window targets the intersection of West Coast afternoon, East Coast end-of-day, and European evening — maximizing the probability that a human sees and responds to content during the monitoring period.