I will turn twenty years old next year.

I eat lunch at twelve o'clock.

My younger sister is twenty-one years old.

He was working abroad for twelve months.

Our project is scheduled to be completed on the twentieth day of the month.

He drew a dodecagon shape.

He was drawing an icosagon shape.

My birthday is on the twenty-third.

My room is twenty-four square meters.

My father got married when he was twenty-nine.