Also i cannot find the source i had read but i will do you one better. I will quote an interview with Maududi on the subject
https://www.icit-digital.org/articles/interview-with-maulana-maududi
Extract from the above interview published in
The Muslim, Jan-Mar 1969
Do you think Muslims the world over should celebrate Eid on the same day, or should it be according to Moon-sightings in a particular country? Or should timezones be accepted ?
To celebrate Eid on the same day all over the world is neither necessary according to the Shariah, nor is it practically possible or beneficial in any significant way. The moon cannot be sighted on the same day all over the world. This is an astronomical impossibility.
Ramadan and Eid have been associated, according to the Shariah, not with the 'birth of the new moon', but with the sighting of the moon.
The moon can be sighted only 25 to 30 hours after its 'birth'. If this 'sighting' of the moon takes place in any eastern country, it must also take place in all the countries to its west. But if it is sighted in a country in the western region, it does not mean that sighting becomes possible in countries which are in the eastern direction. And if sighting is astronomically impossible in the western countries how can any credence be given to the claim of any eastern country that the moon has been sighted there. Any declaration that goes against the established facts can carry no weight, even if it comes from the mouth of any Mufti (juris-consult) of a Muslim country.
There are certain persons who assert that the beginning and the end of Ramadan should be made uniform all the world over and when the moon has been sighted in any one country, all should follow. I am afraid these people do not take into view the facts of geography and astronomy and are, therefore, making an unsound suggestion. The earth is a big planet where differences between sunrise and sunset vary from a few minutes to 24 hours. How is it possible to expect simultaneous sighting of the moon all over the world, or to make others, however distant they may be geographically, act on the basis of the sighting of the moon in a particular country. From the practical viewpoint also, this is bound to create new problems and difficulties. If one sighting is to be followed all over the world, then every year in almost half of the world people will begin their fast in good faith and will have to break that after the so-called sighting. Will this reduce confusion or increase it? If one sighting is to hold valid for the whole world, how would this decision be communicated to people scattered throughout the length and breadth of the world. Have we assumed that those who are in deserts and mountains do possess a radio or transistor to follow the said declaration.
The Shariah does not discourage us to use these and other communication-media, but the injunctions of the Shariah are not dependent on or associated with their availability. Ramadan was observed long before these discoveries and is observed today by those persons also who do not possess them. We are talking of 'Eid on the same day' because we have access to certain mass media. But during the last thirteen centuries when people did not even have access to telegraph and telephone how could this have been possible? If the Shariah really wanted to have 'Eid on the same day' then this injunction must have remained impracticable for many centuries and its implementation could take place only after certain discoveries of our own times. This is not the approach of the Shariah and we must not try to impose this upon it.
We are free to avail from all beneficial discoveries of our times, but the simplicity of the Shariah is not to be marred in any way.
One thing that should be kept in view is that 'Eid' in Islam is an act of worship and not merely a social function or festivity. We should not look upon it in the same way as others look upon their social functions. The spirit of the ibadah (act of worship) must be jealously guarded.
I could not have said this any better. Highlighted are the important points i tried to make.