2
modules/news/blocks/news_top.php
$news['date'] = formatTimestamp($myrow['published'],"s");
P.S.
modules/news/xoops_version.php is helpful for locating things like the above:
$modversion['blocks'][4]['file'] = "[color=ff0000]news_top.php[/color]";
$modversion['blocks'][4]['name'] = _MI_NEWS_BNAME5;
$modversion['blocks'][4]['description'] = "Shows recent articles";
$modversion['blocks'][4]['show_func'] = "[color=ff0000]b_news_top_show[/color]";
$modversion['blocks'][4]['edit_func'] = "b_news_top_edit";
$modversion['blocks'][4]['options'] = "published|10|25";
$modversion['blocks'][4]['template'] = '[color=ff0000]news_block_new.html[/color]';