The flag of Sri Lanka is called the “Lion Flag”, because it shows an image of a golden lion.
Of course, it has a variety meanings,
e.g., the lion symbolizes the bravery of the Sinhalese;
four leaves represent the four concepts of Buddhism;
green and orange go for Muslims and Hindus, respectively,
and the golden border stands for the unity of the nation.
Buddhism is the main religion in Sri Lanka;
there are also many believers of Hinduism, Islam and also Christianity.
Sinhala and Tamil are official languages in Sri Lanka;
English is also widely spoken.
December to March are considered to be the peak months,
however, you can visit Sri Lanka all year round.
I went to the island in August and the weather was very good.