Hi Lelia!
Currently, there isn’t an option for the Third most recent within the dynamic month option but I can see that we do have a suggestion ticket currently for this.
If you are using this via Financial statements the prior previous option in the columns menu may help with this issue:

For more information on Defined periods please see here: https://helpphocassoftware.atlassian.net/wiki/spaces/userdoc/pages/590379/Set+defined+periods+for+a+database
Thanks!
Jack
Hi Jack,
thanks for the reply, but we need the period to keep rolling each month in dashboard and favourite reports, it is hard to go back to manually update the format each month. It will be great if your team can add the 2 periods directly. thanks
Leila
