| Class of 2019 | C24 – 7pm, 18 July (Thursday) | Photos | Video | |
| Class of 2018 | C02 – 10am, 12 July (Thursday) | Photos | Video | |
| Class of 2017 | C10 – 10am, 9 July (Sunday) | Photos | Video | |
| Class of 2016 | C07 – 10am, 9 July (Saturday) | Photos | Video | |
| Class of 2015 | C11 – 8pm, 9 July (Thursday) | Photos 1 | Photos 2 | Video |
| Class of 2014 | C13 – 3pm, 11 July (Friday) | Photos1 | Photos 2 | |
| Class of 2013 | C19 – 10am, 15 July (Monday) | Photos | ||
| Class of 2012 | C15 – 8pm, 10 July (Tuesday) | Photos 1 | Photos 2 | |
| Class of 2011 | C09 – 3pm, 7 July (Thursday) | Photos | Video | |
| Class of 2010 | C16 – 10am, 11 July (Sunday) | Video | ||
| Class of 2009 | C09 – 3pm, 9 July (Thursday) | Photos | ||
| Class of 2008 | C10 – 8pm, 10 July (Thursday) | Photos | ||
| Class of 2007 | Schedule unknown | Photos |
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| Class of 2018 | 24 April (Tuesday) | Photo |
| Class of 2017 | 18 April (Tuesday) | Photo |
| Class of 2016 | 19 April (Tuesday) | Photo |
| Class of 2015 | 20 April (Monday) | Photo |
| Class of 2014 | 22 April (Tuesday) | Photo |
| Class of 2013 | 27 April (Saturday) | Photo |
| Class of 2012 | 18 April (Wednesday) | Photo |
| Class of 2011 | 20 April (Wednesday) | Photo |
| Class of 2010 | 11 May (Tuesday) | Photo |
| Class of 2009 | 13 June (Saturday) | Photo |
| Class of 2007 | 14 July (Saturday) | Photo |
| Class of 2006 | 17 June (Saturday) | Photo |
| Dept Staff & Alumni Gathering @ NUS Guild House | 8 March 2008 (Saturday) | Photo |
| Science Alumni Family Day | 23 June 2007 (Saturday) | Photo |
| Science Alumni Family Day | 3 June 2006 (Saturday) | Photo |
| Science Alumni Family Day | 12 November 2005 (Saturday) | Photo |
| Science 75th Anniversary Celebrations | 9 October 2004 (Saturday) | Photo |
| Alumni Homecoming | 4 September 2004 (Saturday) | Photo |