[pinkpanther]

We follow lunar calendar for deciding the month, fasting, hajj, wedding, and every aspect of our life.
Even in Singapore, There are calendars with Islamic year, month, day , prayer time and important days.

You may check your printed calendar at your home .

In every country, Muslim scholars top body confirms the sighting of the new moon and the starting of the month.

The Gregorian calendar is spot-on accurate to an accuracy of thousands of years. The Islamic Lunar calendar isn't even accurate to the length of one year