We have a workflow that moves files to various subfolders after specific actions are taken.  Files will intially go to folder A; specific action occurs that triggers moving file to subfolder A.1.; another specific action occurs that triggers moving field to subfolder A.2.; etc.

We would like to be able to capture the date the move takes place as the file goes from one folder to the next folder.

i.e. a file hits folder A and it there for several days before a specific action prompts it to go to subfolder A.1.  We want to "grab" the date this move to subfolder A.1. happens and put it in to the metadata.  

What we are ultimately attempting to do is to determine 1) when the file goes from folder A to subfolder A.1. and then b) how long it takes for the file to move again to subfolder A.2. and so on.  In other words, how long was it between when the file hit subfolder A.1. and when it hits subfolder A.2.?

Please advise.