The concept of the session date has been a handy capability in AX for many version. It gives you the ability if you are for exampling entering a lot of journal entries to set the date if you want them to be put through on a specific date which isn’t the actual date. Essentially helping with defaulting the date to avoid you having to re-set it.
Here is a quick overview.
AX7 Build 7.0.4230.16130