Read your own hours first
YouTube, TikTok, and Instagram all show when your audience is on the app. Use that before you use a blog that averaged millions of accounts that are not yours. A night-shift audience and a student audience should not share a clock.
For a new account with no data, post when you can stick around for the first hour. Early comments and a creator who replies still matter more than hitting 5:12 p.m. because a chart said so.