Are you saying you want to update a category field to a different status/category when the date field is older than 2 month of the item creation date? If so you will need to us Globiflow for that, its not possible via a calculation. I would suggest you post on their forum if you have Globiflow. If you do not have Globiflow then it may be possible to create a banner that highlights if it is older, I'm just not sure how to calculate based on the inbuilt creation date, you may need to fill in a date field as creation date (or have a flow add it if you are on a plus plan). If you want some instructions on the latter I would be happy to help.