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
A long time
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 month
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.