I Think it is six Days. Three there and three Back.
12 days
29 1/2 days
The synodic period of the moon is about 29.53 days.
A month or so...
It would depend how fast you were traveling, but with a space shuttle it would take about a week
how long did it take to build the half moon
It takes approximately 29.5 days to go from a new moon to a full moon and back again, completing one lunar cycle.
to what
It takes about 29.5 days for the moon to complete one full phase cycle, from new moon to full moon and back to new moon again.
A long time
It takes approximately 4 days to travel to the moon and back using current spacecraft technology, regardless of moon days. A moon day is the same as its orbital period, about 29.5 Earth days, and does not affect the travel time to and from the moon.
A month