A recent 2025 analysis by Buffer shows that the best times to post on Instagram on Friday are 3 p.m., 2 p.m., and 4 p.m., and these times are globally effective across time zones. Additionally, Sprout Social identifies 11 a.m. as another strong posting window for Fridays.To maximize engagement on Fridays, schedule your posts between 11 a.m. and 4 p.m., with the 2 p.m. to 3 p.m. range as the sweet spot for reach and interaction.