This is a Spanish calendar made in 2020, with the theme of Nicaragua. You could use this to get an idea of what a Spanish calendar project may look like. You may notice that they start on a Monday rather than Sunday. The pictures have captions in Spanish. There are also holidays celebrated in Spanish-speaking countries sprinkled through as well.
You can create a calendar by going to "insert", and click "table". Next go to the right 7 and down 6. Then you can fill in your calendar dates and days of the week!
Created on Google Slides