Google Calendar is a time-management and scheduling calendar service developed by Google
Android app (4.1+)
iPhone & iPad app
Export your data from Google Reminders
Other
Create an event
Invite people to your Calendar event
Change your event privacy settings
Respond to event invitations
Delete an event
Transfer Google calendars or events
Invite groups to calendar events
Use Google Calendar appointment slots
Share your calendar
Create & subscribe to new calendars
Edit a calendar
View your day, week, or month
Use your calendar offline
Print your calendar
Search on Google Calendar
See someone's calendar availability
Sync Calendar with a phone or tablet
Import events to Google Calendar
Fix sync problems with the Google Calendar app
Find Google Calendar events on Apple Calendar
Export your Google calendar
Sync your calendar with computer programs
Fix problems importing
Change your Calendar settings
Event & notification settings
Calendar settings