The honest answer to "what is the best time to post on X" is that nobody can tell you without seeing your audience. The commonly cited window, weekday mornings around 9 to 11am, is what falls out of large-scale studies averaging millions of accounts, and it is a reasonable place to start if you have no data at all. It is not a finding about your account.
That matters more on X than on most platforms, because the feed moves fast and a post's useful life is measured in hours. Getting the window wrong costs you more here than it does on LinkedIn, where a post can still surface a day later.
Why the generic chart misleads
- It averages across timezones. A chart built mostly on US accounts tells a European founder with a US audience roughly nothing about their own morning.
- It averages across audiences. Developers check X at different hours than marketers do; consumer and B2B peaks are hours apart.
- It measures the wrong thing. Most charts report when engagement is highest overall, which is also when competition for the feed is highest. The best window for you is often just outside the crowd.
- It goes stale. Feed ranking changes, and a chart published two years ago describes a product that no longer exists.
Finding your own window in four weeks
This is a small experiment, not a project. The goal is not a perfect answer. It is to replace someone else's average with your own evidence.
- Pick three candidate windows: one early morning, one midday, one evening, all in your audience's timezone rather than yours.
- Post the same kind of content into each, rotating, for four weeks. Same kind matters, because comparing a link post against a text post measures the format, not the hour.
- Read impressions per post, not likes. Impressions tell you whether the feed distributed it; likes tell you whether the post was good, which is a separate question.
- Keep the window that wins, then leave it alone for a quarter. Re-testing constantly means never accumulating enough data to be sure of anything.