King Sihamoni's Birthday is one of the most important national holidays in the Southeast Asian nation of Cambodia. Celebrated on May 14th every year, this day marks the birth anniversary of the current monarch, King Norodom Sihamoni. The king has been in power since October 14, 2004, when he took over the reins of the country from his father, King Norodom Sihanouk.

The day is marked with a variety of ceremonies, all of which revolve around the central figure- King Sihamoni. The royal palaces in Phnom Penh and other cities light up with festivities while the national flag flutters proudly at every nook and corner. Government offices, schools, and other institutions remain closed on this day so as to allow everyone to partake in the celebrations. Across the country, Cambodians pay homage to the king by offering prayers and other religious ceremonies at temples.

In addition to the traditional ceremonies, a series of cultural performances are also scheduled. These performances include traditional dances, music, and dramas that pay tribute to the monarchy. Television and radio stations broadcast special programs highlighting the life and achievements of King Sihamoni. Though it's a joyous occasion, it's also a time for Cambodians to reflect on the significant role the monarchy plays in maintaining peace and stability in the country.