Currently Being ModeratedDec 11, 2012 2:16 AM (in response to tlennartsson)
Edit: I'm making a 2013 Calendar in iPhoto.
Currently Being ModeratedDec 11, 2012 11:11 AM (in response to tlennartsson)
You can't. However, you can try hacking the database file to change the font color to black as jdelisle did for changing the font size in this topic: HT4258 Altering text font size in a...: Apple Support Communities. I would make a backup copy of your iPhoto application and library before attempting it.
You can send a feature request to Apple via http://www.apple.com/feedback/iphoto.html for future calendars.