[ruslan_mart]

Мда.

<iframe name="calendar" style="border-width:0" width="600" height="400" frameborder="0" scrolling="no"></iframe>

var frame = window.frames.calendar;
var url = 'https://calendar.google.com/calendar/embed?showTitle=0&showNav=0&showPrint=0&am p;showTabs=0&showCalendars=0&height=400&am p;wkst=1&bgcolor=%23FFFFFF&src=21dlbguih2d el97p562nusrkgo%40group.calendar.google.com&co lor=%23182C57&ctz=Asia%2FJerusalem;dates={{0}}%{{1}}';

var dates = ['20171001', '20171031'];

frame.src = url.replace(/\{\{(\d+)\}\}/g, function(a, b) {
    return dates[b];
});