That's the date that triggered Hmong's mass migration to Thailand and then here

[theking]

Vietnamese Americans outraged as Los Angeles County honors Jane Fonda on Fall of Saigon anniversary

“It's a day that we mourn,” Nguyen said. Which is why Ta and Nguyen were outraged when leaders of neighboring Los Angeles County declared April 30 “Jane Fonda Day” to honor the celebrity for her environmental activism. The lawmakers immediately began pressuring officials to rescind the recognition.