Pre-condition: 1. Update the following strings in lang/en/langconfig.php to: $string [ 'strftimedaydatetime' ] = '%A, %d %B %Y, %I:%M %p <strong>(UTC%z)</strong>' ; $string [ 'strftimedatetime' ] = '%d %B %Y, %I:%M %p  <strong>(UTC%z)</strong>' ; (You can also do this from the lang customisation page from the web interface if logged in as an admin.) 2. Create an activity (eg Assignment) and set start and due dates. 3. Also set a date availability restriction for this activity.   Without the patch: View the activity on the course page. For the activity date, you should see the html <strong> element displayed instead of the text being bold. The date restriction is displayed with bold formatting. You do not see any html elements.   With the patch: View the activity on the course page. For the activity date, you should see the date with the timezone in bold. You do not see any html elements. The date restriction is displayed with bold formatting. You do not see any html elements.