This past Christmas Santa gave S a small calendar in his stocking (I think he found it in the Target dollar bins). We keep S's calendar on the fridge to give him a visual of the passage of time. At the start of each month I mark weekends with happy face or star stickers and S knows that is when "Daddy is home" and I mark his school days with an apple or star sticker. I also mark special holidays or events. Then we X each day out as we go along. I think it has really helped S see how time passes and patterns in our week. He is also starting to learn some days of the week and months as well.