Are there any free calendars that could be shared available for confluence 4? If so which is the best.
Why don't you try and use a google calendar and then use a plugin to embed it in the page?
https://marketplace.atlassian.com/plugins/net.customware.confluence.plugin.google.calendar
You could also write your own user macro or enable HTML and use the embed code provided under your share option in Google.
https://confluence.atlassian.com/display/DOC/HTML+Macro
https://confluence.atlassian.com/display/DOC/Enabling+the+html-include+Macro
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