The Astronomical New Moon is on Thursday 26 December 2019 at 5:13 am.
The crescent will not be visible on this day
The calculations for crescent visibility on Friday 27 December 2019 for London is as follows:
Sunset 3:59 pm
Moonset 5:24 pm
Crescent age 34 hours 46 minutes
Moon lag time 1 hour 14 minutes
Crescent altitude 7.38 degrees
Crescent elongation 17.23 degrees
The crescent can easily be seen with naked eye
1st Jamadi al-Awwal1441AH will inshallah be on Saturday 28 December 2019 in UK and Southern Europe.
1st Jamadi al-Awwal 1441 AH will inshallah be on Sunday 29 December in Sweden