The Astronomical New Moon is on Thursday 10 June 2021 at 11.54 am. The crescent will not be visible on this day.
The calculations for crescent visibility on Friday 11 June 2021 for London is as follows
Crescent age 33 hours 25 minutes
Time duration 1 hour 20 minutes
Crescent Elongation 14.56 degrees
Crescent altitude 8.59 degrees
The crescent can be seen with naked eye on this day
1st Zilqaad 1442AH will InshaAllah be on Saturday 12 June 2021 in Europe