The Astronomical New Moon is on Monday 14 December 2020 at 4.17pm. The crescent is not visible on this day.
The calculations for crescent visibility on Tuesday 15 December for London is as follows:
Sunset: 3.54 pm
Crescent age: 23 hours 37 minutes
Moon lag time: 41 minutes
Crescent altitude: 4.06 degrees
Crescent elongation: 13.21 degrees
The crescent can be seen with with optical aid only.
1st Jamadil Awwal 1442AH will InshaAllah be on Thursday 17 December 2020 in Europe.