Vietnam timezone history corrections

Alois Treindl alois at
Thu May 19 08:51:19 UTC 2011

It seems necessary to split North Vietnam and South Vietnam into two 
zones for timezone history between 1967 and 1975/1976

I have found corroboration that North Vietnam went from UTC+8 to UTC+7 
on August 8, 1967, while South Vietnam stayed on UTC+8 'until after the 
end of the Vietnam war'. Saigon fell end of April 1975.


There is another reference, discussing the difference between North and 
South Vietnam timezone in 1968,
on page 29.
The timezone difference led to a different date for the Tet festival in 
that year, creating confusion about the starting data for the Vietcong's 
Tet offensive.

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