datum voor FormatGoogleCalendar

mini.js

// zet huidige maand aan
var todaydate = new Date();
var current_day = todaydate.getDate();
var current_year = todaydate.getFullYear();
var current_month = todaydate.getMonth();
if(current_month < 10) {
     current_month = '0' + current_month;
}

// zet volgende maand aan
var nextmonth = new Date(current_year, current_month + 1, current_day);
var next_month_day = nextmonth.getDate();
var next_month_year = nextmonth.getFullYear();
var next_month_month = nextmonth.getMonth();
if(next_month_month < 10) {
     next_month_month = '0' + next_month_month;
}

// bouw de goede url op basis van de 1e van de maand
var starttijd = current_year + '-'+ current_month + '-01T00:00:00Z'; 
var eindtijd = next_month_year + '-' + next_month_month + '-01T00:00:00Z'; 

console.log('vandaag',  todaydate.toISOString() ,'start', starttijd, 'eind', eindtijd);


// op basis van vandaag + 1 maand
// var starttijd = todaydate.toISOString(); 
// var eindtijd = nextmonth.toISOString()

var datumurl = 'https://www.googleapis.com/calendar/v3/calendars/musissacrum%40gmail.com/events?maxResults=500&timeMin=' + starttijd + '&timeMax=' + eindtijd + '&key=AIzaSyA-PEK5eCO0exrV0XajdJEs0-rrdSWZGuA';
formatGoogleCalendar.init({
     calendarUrl: datumurl,       
     past: false,
     upcoming: true,
     sameDayTimes: true,
     pastTopN: 0,
     upcomingTopN: 10,
     itemsTagName: 'div',
     upcomingSelector: '#events-upcoming',
     pastSelector: '#events-past',
     upcomingHeading: '<h2>Upcoming events</h2>',
     pastHeading: '<h2>Past events</h2>',
     format: ['*date*', '*summary*', ' — ', '*description*', ' in ', '*location*']
});