Definition of VJ day in English:

VJ day

noun

  • The day (15 August) in 1945 on which Japan ceased fighting in the Second World War, or the day (2 September) when Japan formally surrendered.

    • ‘The committee is particularly interested to hear from anyone who has memories of Moreton on VE or VJ day.’
    • ‘When it does, of course there's going to be cause for jubilation and some relief, but I'm not sure there will ever be a VE or a VJ day in that context.’

Origin

VJ, abbreviation of Victory over Japan.