moodle/calendar/overlib.cfg.php

ol_delay = 1000;
ol_css = CSSCLASS;
ol_fgclass = 'cal_popup_fg';
ol_bgclass = 'cal_popup_bg';
ol_captionfontclass = 'cal_popup_caption';
ol_closefontclass = 'cal_popup_close';
ol_closeclick = true;
ol_sticky = true;
ol_close = 'X';
ol_offsety = -20;