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Based on your description, I understand that you are creating a calendar and want to include December 2025, while the rest of the calendar is set for 2026. Essentially, you want to know how to maintain both years within the same calendar view.
Although I don't know the specific format of your calendar, I tested this in my environment using a simple table with 3 columns (Date, Month, and Year). Here is how I achieved it:
Step 1: In the Date column (Cell A2), I entered 12/1/2025.
Then, in Cell A3, I entered the formula =(A2+1) and dragged this formula down to the end of 2026.
(Note: The date input format depends on your system settings. In my test environment, it is set to Month/Day/Year).
Step 2: In Cell B2 (Month), I entered the formula =TEXT([@Column1],"mmmm") and dragged it down.
Step 3: In Cell C2 (Year), I entered the formula =TEXT(A2,"yyyy") (or =TEXT([@Column1],"yyyy")) and dragged it down.
Using this method, I was able to insert December 2025 at the start, and the calendar automatically transitioned into 2026 while keeping the correct year for the 2025 dates, as shown in the image below.
In case you are using a different layout or method to generate your calendar, please feel free to send me a sample file via Private Message. I would be happy to test it and assist you further.
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