For perhaps a quarter of a century, from the mid-1930s to the year 1960, the Indochinese Communist Party—later the Workers' Party of Vietnam and now the Vietnamese Communist Party—celebrated the anniversary of its foundation on 6 January each year. The thirtieth anniversary (6 January 1960) was given special prominence in Hanoi and was marked by the publication of an official Party history in Vietnamese, French, English and other languages. Then, quite abruptly in September of the same year, the Party's Third National Congress approved a resolution to the effect that in future the anniversary would be commemorated on 3 February, which thereafter was held to be the ‘correct’ date.