—from Epidemiological Bulletin , Vol. 25 No. 3, September 2004—

Epidemiological Calendar 2005

As in previous years, we are including the Epidemiological Calendar for easy reference and use. The Epidemiological Calendar includes the 365 days of the year, which are grouped in 52 weeks.

Its use during surveillance activities is important because by standardizing the time variable, it provides a means to compare events that occur in a given year or during a specific period to others occurring at a later time or in other countries.

The 2005 Epidemiological Calendar begins on 2 January 2005. This is due to the fact that 1) the epidemiological weeks all start on Sunday and finish on Saturday, and 2) to determine the first epidemiological week of the year, we must choose the first Saturday in January that include four or more days in January.

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Epidemiological Bulletin , Vol. 25 No. 3, September 2004