3
if you mean the eCal that's in the module repository then I'm not surprise; it dates from 2004.
I'd try another module if it were me.
ExtCal 2.2.2 from
http://www.zoullou.net works nicely with XOOPS 2.3.x. See it on my site (link in sig).
Also, you could take a look at
piCal from GIJoe. The current version is 0.91h and is marked as "stable" (not that anything GiJoe releases in unstable
).
Both are excellent modules.