The KBN rules for year pronunciation.
All BC dates, or BCE if you're fussy MUST be pronounced in full. The Battle of Thermopylae did not happen in
four eighty BC it was
four hundred and eighty BC. Absolutely zero exceptions on this.
AD or Common Era dates have much more flexibility.
Before the second millennium, I am of the opinion that BC rules apply.
After the first millennium then it gets more fluid.
1001 is
One Thousand and one. I will not hear of shit like 'ten oh one'. Fuck off.
1066 is perfectly acceptable to be pronounced as
ten sixty six
Anything from 1000 to 1019, must be pronounced in full.
Every centennial year must be pronounced in full. Pulp did not sing "let's all meet up in the year twenty zero zero".
Every year from 1020-1999, it is acceptable to shorten it, for example,
eighteen oh one, nineteen eighty four
In the first century of every millennium, then the year must be pronounced in full. Thereafter it can be shortened, but only if the year is not 0-19.
So examples
- 2001 - Two Thousand and one
- 2010 - two thousand and ten
- 2061 - two thousand and sixty one
- 2101 - twenty oh one
- 2010 - twenty one ten
- 2061 - twenty one sixty one
- 3001 - Three Thousand and one