To sort your contacts/clients based on their registration date first click Contacts in the left hand menu:
Next, click on the drop-down where it says All Contacts
Then click on Create New Filter.
Then set up a name for the view which will show up in the drop-down as soon as you save it under Select Columns:
Next click Add Condition:
Next, select Registration Date from the drop-down list:
Then, click on the Create button and it will show the Registration Date as the custom field:
