Yes! The first step is to ensure your date column (“partediaria”) has the column type of Date. It sounds like you already have that. Now, add a formula column “Month” with the formula:
$partediaria.strftime("%Y-%m")
You can then choose this column for the X-axis.
There is a bit more in this post (e.g. if you’d like to go by quarters rather than months):
https://community.getgrist.com/t/recipe-for-getting-months-and-quarters-from-dates/111