The Union Flag should be flown from States buildings on the following days. It is appropriate for the Guernsey flag to be flown on all other days. In particular, it should be flown on Liberation Day, 9th May.
| January | |
| 9 | Birthday of H.R.H. The Duchess of Cambridge |
| 20 | Birthday of H.R.H. The Countess of Wessex |
| February | |
| 6 | Anniversary of H.M. The Queen's Accession |
| 19 | Birthday of H.R.H. The Duke of York |
| March | |
| 2nd Monday | Commonwealth Day |
| 10 | Birthday of H.R.H. The Earl of Wessex |
| April | |
| 21 | Birthday of H.M. The Queen |
| June | |
| 2 | Anniversary of H.M. The Queen's Coronation |
| 1st, 2nd or 3rd Saturday | Official celebration of the Birthday of H.M. The Queen. |
| 10 | Birthday of H.R.H. The Duke of Edinburgh |
| 21 | Birthday of H.R.H. The Duke of Cambridge |
| July | |
| 17 | Birthday of H.R.H. The Duchess of Cornwall |
| August | |
| 15 | Birthday of H.R.H. The Princess Royal |
| November | |
| 2nd Sunday | Sunday Remembrance Sunday |
| 14 | Birthday of H.R.H. The Prince of Wales |
| 20 | Anniversary of H.M. The Queen's Wedding |
The Guernsey Ensign
The Guernsey Ensign is for use by Guernsey residents who are British subjects. They may fly the Ensign on vessels which are registered or certificated in their own names, regardless of where they sail. Companies which are registered and have their principal place of business in the Island may fly the Guernsey Ensign on their vessels, when operating in waters adjacent to the Channel Islands.
The Ensign is also flown on Fort Grey Shipwreck Museum when it is open to the public.
Days of Mourning
Flags are flown at half mast from the announcement of the death of the Sovereign except on Proclamation Day when they are hoisted right up from 11.00 a.m. until sunset. Otherwise, flags are flown at half mast on the day of death and on the day of the funeral. In respect of the funeral of members of the Royal Family, foreign rulers and Prime Ministers and Ex-Prime Ministers the flying of flags at half mast is subject to special commands from Her Majesty in each case. Half mast means the flag is flown two-thirds up between the top and bottom of the flagstaff.