Nice Calendar!
But if I use $month_nam['04'] = 'April'; in Russian 'Апрель' , I have a problem with encoding : ð�пÃ'�елÃ'� on main page. How can I fix it ? My Forum 2.0 RC3 and TP 1.0RC1 with Russian UTF-8 default encoding...

That is a problem with TP encoding and decoding stuff when it comes in and out of the database. Should be fixed in the next release.

You really should upgrade SMF. There have been several security issues fixed since RC3.

Thank you very much. I look forward new release.
I will be updated...

Can be eat possibility in a calendar code to make the additions converting text UTF in a normal kind?

It's not a problem with the calendar code. It's a problem with TinyPortal.