When you get a message from a close friend, does it matter what time they send it?
Or do you eventually open it, regardless of when it was sent?
“The perfect time to send your email” is a myth. It says that if you can just hack the system, you can get into their inbox at that mystical, elusive moment when they’re not distracted. When they have time for you. When they won’t be annoyed that you popped up, and won’t just overlook you.
This is scarcity thinking.
If people want to read what you send, they don’t care when you send it.
Send better stuff.