The best time to advertise on Instagram varies by day. Generally posting between 10 a.m. and 2 p.m. on weekdays yields high engagement. Mondays and Tuesdays show strong activity around 7 a.m. and during lunch hours. Wednesdays peak from 9 a.m. to 4 p.m. Thursdays are effective in the morning and early afternoon. Fridays see good engagement at 11 a.m. and 4 p.m. Saturdays are less active but mornings around 9 a.m. work well. Sundays are best in the evening from 6 p.m. to 9 p.m. Testing different times helps identify what works best for your audience.