Global Sms app allows you to schedule when you want your Sms messages to be delivered to your recipients.
You can set the sms to be delivered immediately or at the desired date and time.
A scheduled Sms campaign will be delivered at the time it was scheduled in accordance with to your time zone (Your time zone can be set in your account settings).
This option is very useful if you want to edit a message today but send it to the recipients at a different time.