Where does ISNA Hijri date start?

Will ISNA lunar date start from New Delhi? Will it start from Makka before sunset? Why should it start at Greenwich? Will Ramadan date begin from New York, Los Angeles, or International dateline (at 12 mid-night)? By the established Shariah rule a Hijri date and month should start where the crescent moon will become visible at sunset long after 12:00Noon GMT. 

If ISNA calculated date starts from sunset around New Delhi, or Makkah then areas east of New Delhi or Makka would be a lunar day/date behind and in the previous Islamic month. Only areas west of New Delhi or Makka will share the new date and Islamic month from their sunset. 

“Muslim Unity” argument imposes the same lunar date for all countries that “share the same night.” New Delhi shares the same night eastward with Tokyo on the same solar date, but with Hawaii, LA and New York of the previous solar date. How far back ISNA would extend the lunar date?

There are many more complications. For example, in the following lunar month the conjunction will move to a different time. Accordingly, the sunset location will move westward. This constant movement results in several more complications. The Islamic date and month will start from a different location on earth every month, making the same month 29 days long for some regions of the globe but 30 days for the rest. Lunar visibility “anywhere on the globe” is already discarded from the new ISNA criterion.