The correct way to write the sentence is: "Roger, a chef for many years, is cooking." This structure clearly identifies Roger's experience and the action he is currently performing. Using commas helps to set off the descriptive phrase about Roger's background.
Roger the chef, has been cooking dinner for me for many years.
Roger, a chef with many years of experience, is preparing dinner for forty guests at the museum's charity event.
The correct way is to write New Year's Eve.
No.
Roger Whittaker was born on March 22, 1936.
No. The "years" in that instance is simply the plural of year. The "year" does not poses anything.
Roger Goodell is 58 years old (born February 19, 1959).
As of June 2014, Roger Espinoza is 27 years old.
1628 The puritans landed, and in 1635 Roger William was expelled. (7 years)
Roger Kenneth Evans is 64 years old (birthdate: March 18, 1947).
Because he is correct
As of the 2014 MLB season, Roger Kieschnick is 27 years old.