Time Machiner is a service which can send an email to be receive in future.
You can use this simple application to send yourself a reminder of friends’ birthday or any important things. This service looks similar with MailFreezr, which is also let users to send a future email.
Simply choose your date, provide the recipient’s email address, email subject and contents. After that you can proceed to send the future email.
This would be good for sending birthday and anniversary wishes to people you don’t talk to very often and might forget about. And you won’t get stuck on the phone or have to send a card in the mail!
@Beth: Yup, you are right. Even you can set reminder for their birthday, but sometimes you are too busy and will ignore the reminder. So the best way is to send these emails during you free.