Again, you can picture looking at a calendar and tracing the part of it you are referring to. In this case, the particular week. This is an example of the concise nature of many ASL signs. The signer uses the non-dominant FOUR-hand in a horizontal orientation. With the dominant hand, one of those four fingers is pointed to in order to indicate the 1st, 2nd, 3rd, or 4th week of the month.