6 - 20 August - Year 12 Trial Examinations
9 - 10 August - Year 11 2019 Subject Interviews
11 August - National Aboriginal & Torres Strait Islander Children's Day
13 - 17 August - Science Week
14 August - Senior School Parent Forum (9am and 7pm Library), ICAS Maths Competition, Year 10 D&T Excursion, Quota Club Student of the Year 2018
15 August - Year 8 MISA Debating (Home), Year 11 Physics Olympiad Quiz
16 August - Dio Athletics Carnival
13 - 17 August - Science Week
20 August - Year 8 Reflection Day, Yera 9 Food Tech Excursion
21 August - CCC Netball Championships, Year 7 Brainstorm Productions Incursion, Year 9 Liturgy
22 August - Year 9 Information Evening, DIO Volleyball
23 August - Year 8 MISA Debating (Home)
27 August - College Group Photo Day
28 August - Sports Assembly
29 August - Dio Hockey
30 August - Year 8 MISA Debating
31 August - Father and Daughter Dinner Dance
3 - 7 September - Literacy and Numeracy Week
4 September - College Assembly (Literacy and Numeracy Focus)
5 September - Indigenous Literacy Day, HSC Projects Showcase
6 September - College Assembly (Student Leadership Commissioning)
7 September - Middle School Dance (St Gregory's College)
11 September - Senior School Assembly
14 September - AIME Excursion Years 9 -10
18 September - Macarthur Max Potential Showcase
21 September - CCC Athletics
25 September - Year 12 Assembly, Year 12 Graduation Dinner
26 September - Year 12 Graduation Mass and Awards
27 September - Year 12 Formal
28 September - Staff and Students Finish for Term 3
15 October - Staff and Students Return for Term 4