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According to Hubspot, the best time to post on Instagram is between 2 PM and 3 PM CDT. The best day to post is Thursday, not just at 3 PM, but at 5 AM, 11 AM, and 4 PM as well. When you post at the right time, you get more reach, more engagement, and more “follower spikes” Hubspot has found that the more your posts on Instagram the more engagement and followers you’re going to get.