Complex sentence: Total Defence Day (Chinese: 全面防卫日) is celebrated annually on 15 February in Singapore to commemorate the anniversary of the surrender of the British to the Japanese on 15 February 1942, after 3 years and 8 months of Japanese Occupation.
Split into simpler sentences: Total Defence Day (Chinese: 全面防卫日) is celebrated annually on 15 February in Singapore. The event is to commemorate the anniversary of the surrender of the British to the Japanese on 15 February 1942, which marked 3 years and 8 months of Japanese Occupation.