The Google Calendar layout is very easy to get used to. You create different calendars for different activities and view them either all together on the same calendar or on separate ones. You'll also be able to view your calendars with different layouts - for example, your social calendar as a 7-day week, your university lectures agenda-style and birthdays as a monthly spread.

One feature that really helps Google Calendar stand out is the ability to import other calendars - your own and from other users who give you permission - as well as extending sharing privileges to others. This makes it perfect for anybody who works or operates in a team, such as a family or office situation, with each member using a shared Google Calendar to make sure that everybody is aware of what everyone else is doing.

Signing-up to and using Google Calendar is very easy, especially if you already have a Google Account. Creating new appointments and calendars is also a cinch - just click on the date in question and fill in the details. If it's a more complex task, a meeting with other people for example, click on Edit event details for access to repeat scheduling, location, attendees and event notification.

For a comprehensive calendar application that's accessible from anywhere on the web, try Google Calendar.

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If you have used other online calendars before, notably Google Calendar, you'll be familiar with Zoho Calendar. To add an item to the calendar, click on the date in question. For a quick add, write the appointment in the box that appears and for more detail, click edit. There's also a handy Smart Add function, which interprets a variety of instructions even if they are not written in date format.

Obviously, you'll be able to add multiple calendars to Zoho Calendar, isolating individual ones or viewing them all together. There are also different calendar views - day, week, work, month, and agenda. You can also import calendars from other locations, and share or export calendars you create yourself.

Zoho Calendar is easy to sign up to, requiring just the usual username and password. By creating an account, you'll actually have access to the entire Zoho office suite, an extensive range of web apps. Zoho Calendar is currently in beta and, for the moment at least, is free.

On the whole, Zoho Calendar is a perfect web app - easy to sign up for, easy to use and fully functional. On the downside, the Zoho Calendar appointment reminder function isn't very advanced, but overall it's a very minor quibble.

Zoho Calendar is a great app and rivals any of the more famous calendar services out there on the web.

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