Do you have Instagram Business, if you do you can access your analytics which will show you when your followers are online (times of the day and which days). It can be useful for planning when to post 🙂
A lot of the people I follow seem to post either in the morning or in the late afternoon. So maybe there is something in that?
Between 12 PM and 3 PM EST
For a limited time you can earn 50 points for each sign up from your link! That’s 5x the usual amount!