PostEaseWhy a single universal answer does not hold up
Any published "best time" figure is an average across accounts with completely different audiences: different time zones, age groups, and habits blended together. Applying that average to a specific account is a guess dressed up as a fact, on every platform, not just one.
A chart claiming a specific hour works best for every account on a given platform is, by construction, describing an average account that does not exist. Real audiences cluster around time zones and habits specific to them, and that variation is exactly what a single "best" hour has to flatten out to produce one number.
What matters more than the hour on a clock
Since most platforms test a post with a small slice of an audience before deciding whether to show it more widely, publishing when a meaningful share of your own followers are active gives a post a head start. The mechanism is fairly consistent across platforms, even though the exact ranking details differ.
That early-engagement window matters more on some platforms than others. A feed built around real-time conversation (X, Threads) rewards timing more directly than a platform built around ongoing search intent (Pinterest, where a Pin can keep earning traffic for months regardless of when it was published). Weigh how much timing matters for the specific platform before spending much effort chasing the exact hour.
How to find your own answer
Check your own account's analytics for when your specific audience is active, then post consistently around that window for a few weeks and compare early engagement, not just totals. Your own account's history is a far more reliable guide than any generic benchmark chart.
A consistent posting time, tested for several weeks, also removes a confounding variable other experiments introduce. If the time is held steady while only the content changes, any difference in performance is more likely attributable to the content itself, not the clock.