National Pearl Harbor Remembrance Day National Pearl Harbor Remembrance Day National Pearl Harbor Remembrance Day, also referred to as Pearl Harbor Remembrance Day or Pearl Harbor Day, is observed annually in the United States on December 7, to remember and honor the 2,403 citizens of the United States who were killed in the Japanese surprise attack on Pearl Harbor in Hawaii on December 7, 1941. On August 23, 1994, the United States Congress, by , designated December 7 of each year as National Pearl Harbor Remembrance Day. On November 29, President Bill Clinton issued a proclamation declaring December 7, 1994, the first National Pearl Harbor
Pearl River Mouth basin is capped by the breakup unconformity signifying the transition from syn- to post-rift around 32 Ma. Post-rift sedimentation began with transitional sandstones and dark gray mudstones of the Zhuhai formation in the Late Oligocene. The PRMB has experienced deposition of marine sediment with fluctuating sea levels from the Miocene to present day. Today, terrigenous sediment input is mainly provided by the Pearl River, but during the Cenozoic other larger rivers likely contributed to sedimentation as well. Wells in the Pearl River Mouth basin have been studied to determine the subsidence history of the basin. Using backstripping methods, three separate rifting