The Astronomical New Moon is on Sunday 6 January 2019 at 1.29am. The crescent will not be visible on this day.
The calculations for crescent visibility on Monday 7 January 2019 are as follows:-
Sunset: 4.11pm
Moonset: 5.39pm
Crescent age: 38 hours 43 minutes
Crescent altitude: 9.38 degrees
Crescent elongation: 17.36 degrees
The crescent will be easily visible with naked eye.
1st Jamadi ul Awwal 1440AH will be on Tuesday 8 January 2019.