Are “best send times” universal?

Optimal send times vary dramatically by audience, industry, and individual recipient. Universal "best times" are myths perpetuated by studies averaging wildly different populations. Your **B2B** software audience and someone's retail consumer list have entirely different optimal windows.

Time zone distribution matters enormously. If your list spans multiple regions, any single send time is suboptimal for most recipients. Batch by timezone or use send time optimization that personalizes delivery to individual engagement patterns.

Test your specific audience rather than following generic advice. Run controlled experiments across different days and times. Your data trumps any benchmark study. What works for the average sender is irrelevant to your particular list's behavior.