I grew up in the 90s and I remember being able to truncate the year down to just 2 numbers when talking about years within the current millennium. It seems like we’re still saying twenty before every year and I’m just wondering when that will change.
Most English-spealking people outside the US said ‘aught’ instead of ‘oh’, but definitely about 2005 the ‘two thousand and’ syntax evaporated.
Our quirky university president tried very hard to make “aughty-aught” happen for 2000. It did not catch on.
I think Australian’s usually say “oh”. Signed an Aussie that’s spent enough time abroad to confuse himself on what they actually say