Graphs for all seasons

Seasonal effects are dominant in many environmental time series and important or at least notable in many economic or biomedical time series, to name only a few application areas represented in the Stata user community. In several fields it seems rare to use anything other than basic line graphs of responses versus time to display series showing seasonality. The presentation focuses on a variety of minor and major tricks for examining seasonality graphically, some of which have long histories in climatology or related sciences, but appear little known outside. Some original code will be discussed, but the greater emphasis is on users needing to know Stata functions and commands well if they are to exploit the full potential of its graphics.