With the spring & summer allergy season upon up, I have taken the code from Example 17 (p. 127) of my book (SAS/Graph: Beyond the Basics) and used it to plot some pollen data, to help predict when my allergies might act up.
Here's the original Example 17:
http://robslink.com/SAS/book/example17.htm
And here are several 'pollen graphs' created using the same code, but different data:
http://robslink.com/SAS/democd55/calendar_pollen_tree.htm
http://robslink.com/SAS/democd55/calendar_pollen_grass.htm
http://robslink.com/SAS/democd55/calendar_pollen_weed.htm
Hope you enjoy them! :-)

One Comment
Here's another use of Robert's calendar chart ...
http://www.albany.edu/~msz03/temps.html
that includes a link to a chart of temperatures in Raleigh on a daily basis for the past ten years ...
http://www.albany.edu/faculty/msz03/temp/raleigh_temp.html
note: looking at the above calendar charts works best in Google's Chrome browser ... make sure you place the mouse cursor over the chart to bring up daily temperature data