Change the length of a specific lunar month in windows, from 29 days to 30 days.

Hi:
as you know, In Hegira date Lunar months some of months are 30 days, and the others are 29 days only.
How can I change the these settings for a specific month.
For example if month number 10 is 29 days at the regional date settings for the year 1432. And I need to change it to 30 days. Could I do such thing?Please help.
Notes: people depends on lunar arithmetic calculation in define these 29 & 30 settings, but in fact in many cases these calculations are defer when seeing the birth of the moon by Naked eye .