Google Calendar

Cloud-hosted calendar and scheduling service for managing events, meetings, and availability. Syncs across web, mobile, and wearable devices with built-in appointment booking, shared calendars, and integration with email and video conferencing.

Part of Google Workspace, used by millions of organizations from SMBs to enterprises. Differentiates with a full REST API and CalDAV support for programmatic access, native integration with Gmail, Meet, and Tasks, plus Apps Script for automation. Client libraries available for Java, JavaScript, Python, and other languages.

Key capabilities:

• REST Calendar API v3 and CalDAV for programmatic calendar and event management
• Built-in appointment booking pages with optional payment collection for Workspace subscribers
• Shared calendars, ACLs, and working location settings for team coordination
• Native integration with Gmail, Meet, Tasks, and Google Workspace add-ons
• Apps Script and add-on framework for automation and custom extensions

Applications sync events and availability, schedule meetings from CRMs or support tools, and send booking links to customers. Developers build scheduling UIs with the Calendar API, automate event creation from forms or sheets via Apps Script, and integrate availability checks into booking flows. Teams use shared calendars for resource scheduling, meeting room coordination, and cross-timezone collaboration.