OR
Type in the link: calendar.google.com
You can also use the day, week, month buttons to see your calendar in different layouts
Type in the event
OR
Click Edit event to add further details
Edit the event to however you like:
e.g.
-Unclick the All day box to set a time
-Adding a notification will send an email to your account
-Colour co-ordinate similar events
And click Save to save all the details for your calendar,