Comment 8 for bug 771597

Just got a bug report from a user who is confused by the message we display:

"This warning is displayed on my site, but I'm not sure what it tells me as a Mahara admin. The message should be a bit more explicit and perhaps gives an idea of how to fix it. What does %z refer to?"

So perhaps we should say that %z is a "PHP date formatting code" and that "this problem is usually due to a limitation in running PHP on Windows".