"I sent you a calendar invite," I said. I created a new calendar event in Google Calendar, added her email address to the invitation list, and sent the request. "I don't see it," she replied. Her ...

The discovery of a 13,000-year-old pillar at Göbekli Tepe, Turkey, reveals the world’s oldest known calendar. Carved with 365 "V" symbols, this ancient calendar includes 12 lunar months and 11 extra ...

Google Calendar, iCal, Outlook, and many other apps allow you to create multiple calendars. However, managing too many calendar apps for different purposes can become challenging. To stay organized, ...