Why did James Cameron chose the 日期 August 24th as the birthdate for the 阿凡达 (on the computer screen in the last scene)?

I have no idea. It could be just a 日期 picked at random. Could be someone's real birthday that the cast 或者 the director know. Who knows.

Im not sure but maybe it was the 日 in 1994 when James Cameran came up with the idea of Avatar, Maybe he had a dream about it 或者 somethin...Dunno*