2,012
The correct way to write the year on an invitation is "two thousand twelve." This follows the standard format for writing out the year in words.
Two thousand twelve.
In words? Two thousand twelve. But if you mean numbers, then it's 2,012
12,002
two thousand twelve
Two thousand twelve.
Two hundred twelve thousand, five hundred.
This is how you write six billion two hundred million twelve thousand six: 6,200,012,006
two hundred & twelve thousand, two hundred
This is how you write it: 200,040,012
One thousand, two hundred twelve.
two thousand twelve