WhatsApp does not have a built-in message scheduling feature for all users
Use WhatsApp Business if your version includes greeting or away messages for limited automation
Use a third-party scheduling app that supports WhatsApp message scheduling
Install the app from a trusted source
Grant the required permissions carefully
Open the scheduler app and select WhatsApp as the target app
Choose the contact or group
Type the message
Set the date and time
Confirm the schedule
Keep your phone on and connected if the app requires it
Check the scheduled message before the send time
Use Android automation tools if supported on your device
Use iPhone Shortcuts for reminders or automation where available
Verify that scheduled sending complies with WhatsApp policies