(These dates are collated from the School Calendar provided on the Mosman Prep website. Many dates have not yet been provided by the school (especially after Term 1) so it is not exhaustive, but intended to be a helpful overview. I will update in red as more dates come to hand. Please let me know if anything is missing.)
30 January: First Day Term 1
5 February: Year 4 at Terrey Hills
6 February: Year 4 Parent/Teacher Information Evening 18:30-19:30 (4G Classroom)
13 February: Senior Primary Swimming Carnival 09:30-14:00, Cranbrook Senior School Swim Centre
15 February: P&F Welcome Cocktail Party 18:30-21:30, at Mosman Prep
19 February: Year 4 at Terrey Hills
25 Feb: Senior Primary Cross Country Carnival 11:00-12:30, Georges Heights Oval/Rawson Park
12 March: Year 4 at Terrey Hills
29 March: Mosman Prep Father and Son Golf Day, Cammeray Golf Club
10 April: Easter Service 19:00-20:00, Mosman Village Church
11 April: Last Day Term 1
25 April: ANZAC Day Dawn Service 06:00-07:30, Georges Heights (school community encouraged to attend)
29 April: First Day Term 2
30 April: Wednesday afternoon training commences for Term 2
3 May: Round 1 IPSHA winter sports
6 May: Year 4 at Terrey Hills
9 May: Mothers' Day Breakfast 08:15-09:30, at Mosman Prep
23 May: Year 4 Parents' Dinner
25 May: Balmoral Burn Fun Run (optional)
27 May: Year 4 at Terrey Hills
29 May: Senior Primary Mosman Prep and Queenwood Combined Athletics Carnival 08:00-14:30, Sydney Olympic Park Athletics Centre, Warm Up Track
7 June: No Saturday sport (King's Birthday long weekend)
9 June: Public Holiday (King's Birthday)
15 June: Mini-Mos fun run (optional)
17 June: Year 4 at Terrey Hills
21 June: Round 7 IPSHA winter sports (last game in Term 2)
21 June: Mosman Prep Community Event, 14:00-17:00, Mosman Prep school grounds
27 June: Honours Assembly 11:30-12:30, Mosman Village Church
27 June: Last Day Term 2
22 Jul: First Day Term 3
26 Jul: Round 8 IPSHA winter sports (first game in Term 3)
5 Aug: Year 4 day at Terrey Hills
7 Aug: Whole School Class Photos
8 Aug: School Group and Sports photos
9 Aug: IPSHA winter sports conclude (Round 10)
11 Aug: Year 4 Terrey Hills
13 Aug: Wednesday afternoon training concludes for the term with house competitions
13 Aug: Bully Zero Empowering Parents Webinar 7-8pm
14 Aug: Year 4 dads' drinks (Buena)
19 Aug: Book week parade
21 Aug: Creative Arts Celebration 4.30-8pm at Mosman Prep (compulsory for all boys)
21 Aug: Year 4 mums' drink (Juniper Lane)
5 Sept: Father's Day breakfast (8.15-9.30am at Mosman Prep)
8 Sept: Parent/teacher interviews commence
9 Sept: Year 4 day at Terrey Hills
17-19 Sept: Year 4 School Camp, Lake Macquarie
25 Sept: Last Day Term 3 (Thursday)
14 Oct: First Day Term 4
15 Oct: After-school training for summer sports recommences
16 Oct: Year 4 dads' drinks (Buena), details TBC by events team
18 Oct: IPSHA summer sports games recommence with Round 7
19 Oct: Year 4 Mother/Son afternoon, 3-5.30pm, Warringah Bowling Club Mosman
Oct 21: Year 4 day at Terrey Hills
23 Oct: Grandparents and Special Friends Day, 8.45-10.30am, Mosman Village Church
25/26 Oct: Father Son Camp, Glenworth Valley Campground
30 Oct: Year 4 mums' drinks (Juniper Lane), details TBC by events team
1 Nov: Mosman Prep Golf Day, 12-5pm, Cammeray Golf Club (registered players only)
4 Nov: Year 4 day at Terrey Hills
10 Nov: Year 4 Gibberagong Environmental Educational Centre Excursion
14 Nov: Year 4 End of Year Parent/Teacher Event, 6.30-9.30pm, Betel Leaf
22 Nov: IPSHA games conclude for the season with Round 12
27 Nov: Carols Service, 6-7pm, Mosman Village Church
4 Dec: Term 4 concludes 12.15pm
4 Dec: Senior Primary Speech Night 18:30-20:00, Mosman Village Church