We need to implement some data validation rules for accounts using the date of the most recently closed fiscal period in another system. We can't calculate when the period will be closed as it's a manual process. I would like to add the date to Salesforce so that it will be available for data validation rules but I'm not sure where this belongs. I've tried searching but haven't turned up anything that looks like what I need.

We need to implement some data validation rules for accounts using the date of the most recently closed fiscal period in another system. We can't calculate when the period will be closed as it's a manual process. I would like to add the date to Salesforce so that it will be available for data validation rules but I'm not sure where this belongs. I've tried searching but haven't turned up anything that looks like what I need.