Thanks for the input. As this stage it would be very difficult to change the name of a column as all of our users are familiar with the current name. We would need to have a mechanism that allows it to be changed just for your account, which is complex.
@SeanW8986 The best approach here (for a single matter) is probably to generate the standard reminder dates and then edit them manually. If you have a subset of matters with this flow (e.g. a specific client) you could setup a new workflow.