Despatch an email when a date approaches

Hi there :-) 

I have a calculated date field called 'Next Review Date'
This field is a formula, set 6 months ahead of another date which I enter. 
Two weeks before the 'Next Review Date is [today], I would like an email sent to two people. 

I am a noob at QuickBase, so I have NO idea how to go about this.

------------------------------
Jemma
------------------------------