I don't understand this. The hadith is clear. Look out for the moon. If its not visible or if there are clouds, complete 30 days of fasting. Why confuse matters with scientific calculations. Check moon sighting sites its not visible yesterday not the crescent
Not quite. The sighting of the Moon was the agreed upon method since there were no more scientific, definitive, and/or accurate methods available to confirm the date at the time. There are only two options to pick from and there had to be an SOP for it. Continuing to fast was picked so as not to risk missing one. If the next day it is made clear from the moon's size that it is of the 2nd of Shawal then you will fix your dates to say 2nd of Shawal and not the 1st.There is no ijtehad needed here. What has changed about moon in last 1400 years? Why do we have to go for visual aids and calculations. It's utter madness. What you are calling ijtehad is meant for issues that was never seen before. Moon has always existed. The problem is the blind following of Saudi fitna. On top of that false witnesses. Its madness at its best.
Scientific calculations/methods reduce and nearly eliminate the confusion, not increase it. Confusion is created when we, through our limited knowledge, try to curb the allowances Islam has already afforded us. Clouds, no clouds, doesn't matter, Eid is predicted more accurately. Why would we not adopt it? Just like you do not need to measure the sizes of the shadows of trees anymore to determine if it's time for Asr or not. Bet you didn't know that that is the originally prescribed method of determining its time. Prayer timings for the entire year everywhere are calculated the exact same way as would be the moon's cycle. I don't see anyone suggesting to throw out our watches. There is precedence after precedence after precedence of this. Just that the mullah of today wants his obtuse mentality imposed on Islam and the 15 min of limelight twice every year. Have you ever wondered why every single time the Government uses science to determine the date the Mullah claims that it was wrong? There's a 50% probability of the Government getting it right even if they were flipping a coin.
There is nothing intrinsically religious about sighting the moon, or measuring trees' shadows, or riding a camel to Haj, or giving Azan without a microphone. These were best available means at the time to achieve the actual religious goals. If you find another method that will help you achieve them better, or more accurately, or more reasonably, or even more conveniently, then you obviously need to adopt it. Islam isn't about lakeer ki faqeeriat.