Best Time to Post on Instagram on Monday
Best time to post on Instagram on Monday: 7–9 PM Eastern. Secondary window: 11 AM – 1 PM Eastern. Avoid 8 AM–10 AM — engagement is the weakest of the day.
Mondays open soft and ramp through the morning as users settle in. Avoid posting before 9 AM ET — engagement on early-morning Monday IG is the lowest of any weekday. The 7–9 PM evening window outperforms the morning peak slightly because Monday-night feeds compete with less Stories and Reels content. Carousels and educational Reels (the "Monday motivation" niche notwithstanding) tend to do well; product launches and time-sensitive sales should wait for Tuesday.