Across the UK and throughout the world there are a number of days, weeks, and months a year dedicated to certain causes, ideas, or remembrances. These events can be a great kick-starter for celebration events at your school, and can help staff structure individual or groups of events with the school setting.
There are a number of useful websites such as www.awarenessdays.com or www.educationgroup.co.uk/events where you can find calendars or lists of upcoming and future events in the UK and elsewhere to help spark your imagination!