Hours and Minutes to Angle
1. 7. 2019https://www.mathcelebrity.com/clockangle.php?num=9%3A20&pl=Clock+Angle
For example 21:20
# 21-12=9 and
h=9
m=20
echo "((60*$h)+$m)/2" | bc
280 # = Angle
Because there is 12*60=720 minutes in full circle, so 720/360 is 2.
Little script bin/hma.
