WhatsApp does not have a built-in scheduled message feature for most users
Use a third-party automation app on Android, such as SKEDit or AutoResponder
Install the app and grant the required permissions
Connect your WhatsApp account in the app
Create a new scheduled message task
Choose the recipient or group
Type your message
Set the date and time
Save the schedule
Make sure your phone is on and connected to the internet at the scheduled time
On iPhone, use the Shortcuts app with personal automation if supported
Create a time-based automation
Add the action to send a message through WhatsApp if available
Confirm and save the automation
Use WhatsApp Business features if you need quick replies or away messages
Check whether your device or app permissions allow background automation
Verify the message is sent by testing with a short scheduled message