Here's how I use them...
1. I color the calendar and highlight the days when they have English.(later I choose 2 students to do this)
2. I write down the students' names and birthdays who were born in that month.
3. Then once a week I select a student who's going to be DATE AND WEATHER RESPONSIBLE and write down the name on the right side.
The selected student is supposed to write the date on the board every day at the beginning of the lesson having a look at the calendar and write & draw the weather of the day.
Here's what they may look like