Open Instagram and go to your profile
Tap the plus icon and create a post
Add your photo or video and edit it
Tap Next
Add your caption, tags, and location
Tap Advanced settings
Turn on Schedule this post
Choose the date and time
Tap Schedule
Use Meta Business Suite if the schedule option is not available in Instagram
Connect your Instagram account to Meta Business Suite
Create a post in Meta Business Suite
Select Schedule
Pick the date and time
Confirm the schedule