[Hope]

But the dates on your phones or the date in the newspaper do not follow the islamic calendar...

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.