I have found an answer that may help out someone else.
The solution I was looking for was to find the current month and use this to toggle between messages.
Basic form display example below - date display field is hidden:
Basic form display example below - date display field is viewable:
Expression used for field1:
substring-before(substring-after(today(), "-"), "-")
Currently two sections created
*for my purpose there would be 12 sections with corresponding display messages and from details
I am using default Title field, field1, field2 & field3
Section rule - conditions:
Section 1 - Displays if the date is third month
Section 1 contains a text field message
Section 2 - Displays if the date is not third month
Section 2 contains a text field message
Toggle achieved. For the remaining months of the year the I will add to the rules and conditions.
I am sure there is a better way to do this but it gives me the result I need.