The Astronomical New Moon is on Tuesday 9 October 2018 at 4.47am. The crescent will be visible in Europe with optical aid only.
The calculations for crescent visibility on Wednesday 10 October 2018 for London is as follows
Moonset 7.25 pm
Crescent age 37 hours 33 minutes
Crescent altitude 9.1 degrees
Crescent elongation 20.46 degrees
The crescent will be easily visible by naked eye.
1st Safar 1440AH will be on Thursday 11 October 2018