The paragraph at the top is in English...but the headings for the months (on the left) & the printer, etc (on the right) look like to be in French maybe?
The months are mars 2009, avil 2009, mai 2009 I can figure it out but the dates are also off by one. Very weird!
The calendar is published in English - but it is a Google tool and they present it to each user based on your cookie and possible geographic IP. They (Google) seem to be having some kind of issue. I would bet it resolves itself soon enough.
If you want to be more proactive about it, try deleting your Google cookies (if you know how) or just re-start your browser.
FWIW I am seeing it fine here in Italy in English -