| All Day | CONCERT HALL OUT OF ACTION Venue: Concert Hall RM: Concert Hall | Details |
| All Day | U6th: A-Level Academy conference Venue: Bloomsbury Baptist Church 7th Form, 7th Form External Calendar, Academic TP, Trip | Details |
| 07:15-08:10 | Boys Indoor Hockey - U14/U15 Training Venue: Sportshall Co-Curricular, Sport | Details |
| 08:00-08:30 | Flute Quartet (Adv) Venue: Recital Hall/M2 Co-Curricular, Music | Details |
| 08:15 | Flute Ensemble Venue: recital room Music, RM: Recital Room | Details |
| 08:15-09:00 | House Assemblies Venue: Concert Hall, Sports Hall, PMH, Harrison Centre & Old Library Assembly, House Event, RM: Concert Hall, RM: Harrison Centre, RM: Old Library, RM: Peter Masefield Hall, RM: Sports Hall | Details |
| 09:00-09:30 | AHR meeting Venue: Interview Room RM: Interview Room | Details |
| 09:00-13:10 | PE lessons Venue: Concert Hall RM: Concert Hall | Details |
| 12:00-16:00 | China Delegation Venue: Old Library Estates Team, RGS Foundation, RM: Old Library | Details |
| 13:15-14:00 | Cricket - Performance Squad Venue: RGS Sports Hall Co-Curricular, Sport | Details |
| 13:15-14:00 | Cricket Performance Squad Training Venue: RGS Sports Hall Sport, Cricket, Training | Details |
| 13:30-14:00 | Concert Band Venue: RR Co-Curricular, Music | Details |
| 13:30-14:00 | Concert Band Venue: Recital Room Music, RM: Recital Room | Details |
| 13:30-14:10 | Cheerleading Venue: DS2 Estates Team, RM: Old Library | Details |
| 13:30-14:10 | Lower School (NMB) Venue: PMH Estates Team, RM: Peter Masefield Hall | Details |
| 14:30 | Rugby Union Boys-U12D vs Trinity School, Croydon Venue: H Sport, Rugby Union, Fixture | Details |
| 14:30 | Rugby Union Boys-U12C vs Trinity School, Croydon Venue: H Sport, Rugby Union, Fixture | Details |
| 14:30 | Rugby Union Boys-U12B vs Trinity School, Croydon Venue: H Sport, Rugby Union, Fixture | Details |
| 14:30 | Rugby Union Boys-U12A vs Trinity School, Croydon Venue: H Sport, Rugby Union, Fixture | Details |
| 15:45-18:00 | Symphony Orchestra Venue: recital room Music, RM: Recital Room | Details |
| 16:00 | Chess Mixed-U18A vs King's College School (KCS), Wimbledon Venue: A Sport, Chess, Fixture | Details |
| 16:00-17:00 | Swimming - Yr6&7/U18 Venue: Pool Co-Curricular, Sport | Details |
| 16:00-17:00 | Swimming - Yr2/U13 Venue: Pool Co-Curricular, Sport | Details |
| 16:00-17:00 | Swimming - Yr3/U14 Venue: Pool Co-Curricular, Sport | Details |
| 16:00-17:00 | Swimming - Yr4/U15 Venue: Pool Co-Curricular, Sport | Details |
| 16:00-17:00 | Swimming - Yr1/U12 Venue: Pool Co-Curricular, Sport | Details |
| 16:00-17:00 | Swimming - Yr5/U16 Venue: Pool Co-Curricular, Sport | Details |
| 16:00-17:30 | Girls' Performance Hockey Venue: Hartswood Co-Curricular, Sport | Details |
| 16:15-17:30 | Rugby Union Boys-U16A Training Venue: Hartswood Sport, Rugby Union, Training | Details |
| 16:15-17:30 | Rugby Union 1st XV Boys Training Venue: Hartswood Sport, Rugby Union, Training | Details |
| 17:00-18:00 | Staff Yoga Venue: HC21 Estates Team | Details |
| 18:00 | Postponed Hockey Girls-1st XI vs Wellington College Venue: A Sport, Hockey, Fixture | Details |
| 18:00 | Hockey Girls-U16A vs Wellington College Venue: A Sport, Hockey, Fixture | Details |
| 19:30-23:55 | HOLD prov Christmas Party per GBC Staff meeting | Details |