How about just "whenever I can" for the true fanatics here :-)

Fortunately my job (Unix Sys Admin) gives me plenty of scope for coding perl during the day light hours. I do have a couple of projects I am working on intermittently at home, however I reserve 4am for sleeping thank-you very much!

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Life is a tale told by an idiot -- full of sound and fury, signifying nothing. William Shakespeare, Macbeth