On this day, April 9, in 1942 the USAFFE forces led by Gen. Edward P King Jr. surrendered to the Japanese. In 1961 passed RA No. 3022 designates April 9 of every year as Bataan Day. In 1983, EO No. 203 called it the Day of Bravery. RA No. 9492 s2007 Bravery Day was moved to April 9 or the closest Monday to this date.
The official calendar of the Republic of the Philippines: an almanac of Philippine commemorations enlivened with illustrations and information. –Manila: Presidential Communications Development and Strategic Planning Office, [2014].
On this day in 2003, American forces, etc overthrew Iraq at the end of the Iraq War.
https://www.britannica.com/on-this-day/April-9
On this day in 1959, NASA announced the selection of America’s first seven astronauts, Gordon Cooper, Wally Schirra, Alan Shepard, Gus Grissom, John Glenn, Donald Slayton, and Scott Carpenter.
https://todayinsci.com/4/4_09.htm
This month of April is the Month of Planet Earth (Proclamation No. 1482, s. 2008)
You may want to read: