There was "nineteen o nine" followed by "nineteen ten", but we never had "twenty o nine".
By way of confusion, it has been a very interesting ten years in Welsh. After the straightforward "mil naw naw naw" (a thousand nine nine nine) or even "un naw naw naw" (one nine nine nine), we have had a grammatical feast.
2000 - "Dwy fil" Mil (1000) is feminine so dwy (2) not dau (2) and mil changes to fil after dwy
2001 - "Dwy fil ac un"
and then, because Welsh has masculine and feminine forms also for three and four - tri/tair, pedwar/pedair and the word for year is feminine -
2002 - "Dwy fil a dwy"
2003 - "Dwy fil a thair" - just to complicate matters, tair (three) becomes thair after a (and)
2004 - "Dwy fil a phedair" - and pedair (4) becomes phedair after a
2005 - "Dwy fil a phump" - and pump (5) changes to phump
After that no problem, and we're now coming to the end of "Dwy fil a naw".
I await with interest what it will be next year; "Dwy fil a deg" (Two thousand and ten), "Dwi fil dim un dim" (Two thousand nothing one nothing), or "Dau dim un dim"/"Dwy dim un dim" (Two nothing one nothing).
