Independence Day is celebrated by the country of Gambia every February 18 to commemorate its sovereignty from the British colonial rule on 1965 from approximately 300 years. It was also on this day on 1965 that the Gambians finally established their own flag and replaced the Union Jack.
The Gambians never fail to look back to their history and recall their fulfilling past. So each year, the people of Gambia hold several activities and flag hoisting ceremonies to give honor to the day of their independence. They also hold a flag down celebration where the Union Jack is lowered in replacement of the Gambian National flag as a reenactment of the history and educate the young generation.
According to wikipedia