This patch is to ensure that "not logged in users" or guests can access the calendar when "Auto-login guests" ($CFG->autologinguests) is set to true. Pre-test conditions: Add the upcoming events block to the site frontpage. Add a few site events so that these show up in the upcoming events block. As a logged in user (Admin, student or teacher) you should be able to see these upcoming events. Site should not force users to log in and guest access should be allowed.   Auto-login guests: Disabled Log in as site admin and set the following setting:  - Auto-login guests (autologinguests): Uncheck to disable, if it is not disabled. Log out so that you are no longer a logged in user. Visit the site home/frontpage, and expand the block drawer so see the upcoming events block. Click on an event name/link. You should be redirected to the login page. Log in as guest. You should be able to see the calendar event page, now that you are logged in as a guest user. This is normal expected behaviour. Auto-login guests: Enabled Log in as site admin and set the following setting:  - Auto-login guests (autologinguests): Check to enable. Log out so that you are no longer a logged in user. Visit the site home/frontpage, and expand the block drawer so see the upcoming events block. Click on an event name/link. You should be automatically logged in as guest and see the calendar page.