When did saigon turn into ho chi minh city?

Question

When did saigon turn into ho chi minh city?

Answer 1

1973

Answer 2

When the North took over the South.

Answer 3

April 1975, after the war ended, though many people still use the old name.

Answer 4

After the country reunification in 1975. In 1976, the VN National Assembly decided to change Saigon to HCMC to remeber Ho Chi Minh's deeds in the country's independence.

As a Saigonese, I personally prefer Saigon over HCMC. Saigon bears a historical value and is still widely used by locals.