UTF-8 With The "%s thing"

This message was sent from: Development
http://forums.oscommerce.com/viewtopic.php?p=208234#208234
----------------------------------------------------------------

// file catalog/includes/languages/
[code]
define('TEXT_DATE_ADDED', 'This article was added to our catalog on %s.');
[/code]
should render on screen like

----------- cut here------------

This article was added to our catalog on Tuesday 05 August, 2003.
or like this in Ukrainian: 

This article was added to our catalog on Вторник 05 Августа, 2003.

but in Netscape 7.02 page encoding is utf-8 renders like this:

This article was added to our catalog on ������� 05 �������, 2003.

----------- cut here------------ 
copy and paste 2 notepad, ultraEdit or whatever U use, save it as Html
and view it encoding utf-8. You will see what I see :roll:
Question is:
Where the system is getting this %s (date) from.
How to change it, so its render correctly under UTF-8 

Dose it has anything to do with:

// catalog/includes/languages/ukrainian.php
[code]
setlocale(LC_TIME, 'ru_RU.WINDOWS-1251');
[/code]

I have changed this to:
[code]
setlocale(LC_TIME, 'ru_RU.UTF-8'); 
[/code]
but it don't work.

Any ideas?