Set Wait Action in Worfkow with time conditions

Hello:

I need to create a workflow that sends an email when a record is created, but with the condition that if the time of creation is between 00:00 and 07:59, wait and send the email at 08:00.If the record is created from 08:00 until 23:59, no wait is needed.

I've tried some formulas in the "How long / Period expression" section, like: (8 - Mid(ToChar(Today(), 'YYYY/MM/DD hh:mm:ss'), 13, 2)) * 60, but it doesn't work.

Does anyone know how I could meet this requirement?

Thanks in advance!

Regards,

Sebastián