Note about %z gotcha

[asmeurer]

This is a good opportunity to improve on the python.org docs. An issue I've seen is that %z does unexpected things on Windows (http://bugs.python.org/issue20010). Instead of returning +HHHH it returns a string name of the time zone (often with Unicode characters). Code that uses it is liable to break when run in Windows.

[mccutchen]

@asmeurer I'm not familiar enough with this bug to feel very confident in writing a useful warning, feel like submitting a pull request?

It might be a little tricky, as strftime.org is built by extracting the formatting table from the live Python docs, but it might make sense to have a sort of generic facility for adding extra annotations to any of the entries in that table.

[asmeurer]

The issue is primarily that the output is different. For me, on Windows 8, time.strftime('%z') gives 'Central Daylight Time' (as is %Z).

The bug I'm not as sure about. See conda/conda#651 for an example of it. I think some time zone names have strange unicode characters (in this case, it was a curly quote ’).