I spent the last three weeks digging through every major Instagram study I could find - Buffer's analysis of 9.6 million posts, Sprout Social's data from 2.7 billion engagements, Hootsuite's report across 118 countries, and RecurPost's breakdown of 2 million+ posts. And honestly? The answers surprised me more than I expected.
If you're still posting at random hours and wondering why your reach tanked, this breakdown should help. I'm laying out the best time to post on Instagram by day, by content type, and by niche - all backed by real numbers, not guesswork.