The Astronomical New Moon is on Saturday 13 March 2021 at 10.30am. The crescent cannot be seen on this day.
The calculations for crescent visibility on Sunday 14 March 2021 for London is as follows:
Sunset 6.04pm
Moonset 7.12 pm
Crescent age 31 hours 43 minutes
Moon lag time 1 hour 9 minutes
Crescent elongation 15.04 degrees
Crescent altitude 9.21 degrees
The crescent is likely to be seen on this day. 1st Shaaban 1442AH will InshaAllah be on Monday, 15 March 2021 in Europe.