The Public Holidays for London for the year 2023 was announced by the Government as follows:
| Holiday | Date | Day |
| London government holidays in January 2023 | ||
| New Year’s Day | 2 January (substitute day) | Monday |
| London government holidays in April 2023 | ||
| Good Friday | 07-Apr | Friday |
| Easter Monday | 10-Apr | Monday |
| London government holidays in May 2023 | ||
| Early May Bank Holiday | 01-May | Monday |
| Spring bank holiday | 29-May | Monday |
| London government holidays in August 2023 | ||
| Summer bank holiday | 28-Aug | Monday |
| London government holidays in December 2023 | ||
| Christmas Day | 25-Dec | Monday |
| Boxing Day | 26-Dec | Tuesday |
