Can anyone help with providing the best solution for creating a site or list workflow in O365 to generate an email on a quarterly basis to all of the users collected in a specific column?  The Calculate Date function is not available in O365 and I am looking for a workaround.  Specifically, I have a list that is populated through a form that is completed by hiring staff and I would like to ping each of the submitters quarterly to request updates on the status of the staff.