The Astronomical New Moon is on Tuesday 24 March 2020 at 9:28am. The crescent cannot be seen on this day
The calculations for crescent visibility on Wednesday 25 March 2020 for London are as follows
Sunset 6:24pm
Moonset 7:41 pm
Crescent age 32 hours 56 minutes
Moon lag time 1 hour 6 minutes
Crescent altitude 9.41 degrees
Crescent elongation 15.39 degrees
The crescent will be easily seen by naked eye
1st Shaaban 1441AH will inshaAllah be on Thursday 26 March 2020 in Europe
For Sweden, the crescent may be visible with naked eye on Wednesday 25 March 2020. Local sightings will need to be done to confirm this.