A simple javascript code will make you send scheduled birthday wishes, reminders etc on whatsapp.
Desktop browserWhatsapp Web
1. Log in to Whatsapp web on the browser from here
2. Copy the code from here
3. Open the console of your browser in which the whatsapp web is running. (Press Ctrl +Shift+I) and paste the copied code then hit enter.
4. Now open the chat screen of the person you want to send Message to.
5. Now on the console window write wishOnTime(hour,min,msg) and press enter.
here " hour and msg" is time at which you want to send the message and the msg is the Message you want to send to.
For eg. if you want to send Happy Birthday on 11:59 pm you will call wishOnTime(23,59,"Happy Birthday")
Voila!! You are done. The message will be sent to the selected person on the specified time.
Do not REFRESH or CLOSE your tab window.
Do not SWITCH the person on chatscreen otherwise the message will be sent to another person.
Keep your phone CHARGED and CONNECTED to the internet.
Keep your computer connected to the internet.