Blue
Moon
 
Screen 1 of 1
 
The
moon
 
plays
 
a
crucial
role
this
Halloween.
 
Halloweens
full moon
is
called
 
a
blue
moon
 
because
 
it’s
 
the
second
full moon
 
of
 
the
month.
 
In
2020,
 
it
just
happens
 
to
fall
on
Halloween.