But when using a computer , it is simpler to handle the modified year Y , which is Y - 1 during January and February :
Zeller used decimal arithmetic , and found it convenient to use J and K in representing the year .
When using a computer , it is simpler to handle the modified year Y , which is Y - 1 during January and February :
Zeller used decimal arithmetic , and found it convenient to use J and K in representing the year .