zlacker

>>asim+(OP)
I was unaware until this year that it was based on when the moon was _sighted_, not just on a conventional lunar calendar. This leads to very short notice public holidays in a couple of countries AIUI.

>>rsynno+Xv1
My local mosque (and many others in the area) use calculations, but my mom's mosque just a few cities away uses moon sighting. We ended up starting and ending Ramadan at the same time but there was uncertainty on her part until last night.

At the end of the day you just follow whatever mosque you go to. If you want to follow moonsighting but your mosque does calculation, where do you go to celebrate Eid if the days differ?

Personally I wouldn't go to a mosque that uses moonsighting because I like predictability. My boss is Muslim so she would understand but it's still annoying for the company if I just went "I'm off tomorrow byeee" the night before.

I imagine some Muslim countries differ in the same way (some use calc some use sighting), though I can't say off the top of my head which countries use calculation.