The angels call you to service! Four is a representation of solid spiritual frameworks, and zero, of the infinite divine. The number 9 is a number related to service and good works.
Taken together, the angels are telling you that you are called to do some spiritual work today.
Take some time to speak to a friend or loved one who may be hurting, or keep an eye out for someone who seems to need a shoulder to lean on or a friendly ear.
You will be special to someone today.