I guess it all depends on how you number the series. There's 'Night', then there's 'Diary' which takes place before and during the events of 'Night'. Then there's 'Survival' which takes place between 'Night' and 'Dawn'. Followed by 'Day' and 'Land'. So chronologically 'Day' is now the fifth movie in the series.
However, if you so like, I'll change my movie to 'Godzilla vs Mothra', the fourth movie in the original Godzilla series and the last to feature 'The Big G' as the true villain of the series before morphing into Earth's protector in the next movie, 'Ghidorah, the Three-Headed Monster'.
However, if you so like, I'll change my movie to 'Godzilla vs Mothra', the fourth movie in the original Godzilla series and the last to feature 'The Big G' as the true villain of the series before morphing into Earth's protector in the next movie, 'Ghidorah, the Three-Headed Monster'.