[TheAdminMarket]

Thank you @kh99

Your solution helped me a lot, but in addition I had to modify the locale. Most strange locale never seen it before:

setlocale(LC_ALL, 'el_GR.UTF8');
$show['todayis'] = strftime("%a %d %b %Y %H:%M:%S",strtotime(time()));

Now what left out it to find the combination for l, d F Y but I think that I can do it. The main problem was to display Greek alphabet something that now works.

--------------- Added [DATE]1415461016[/DATE] at [TIME]1415461016[/TIME] ---------------

The final way to show a date like l, d M Y in a non English language is:

setlocale(LC_ALL, 'el_GR.UTF8');
$show['todayis'] = strftime("%A, %d %B %Y",time());

Please pay attention to UTF8 It must be without - between.