This video is great example of calendar time in a kindergarten class. The works with the students on days of the weeks, months of the year. Counting is greatly used during calendar time where the students will learn to count the number of days in school, also celebrating 100th day of the school.
Great classroom organization tip! Put bulletin board numbers or words on large rings--everything flips. No more boxes/files to store extra numbers or words. Make a few blank cards on the rings too, so you can change things up when necessary.