The average length of the full cycle of moon phases ... the time between
seeing any phase and seeing the same phase again ... is 29.531 days.
I suppose that's 4.219 weeks, which is something like 4weeks 1day 12hours 45minutes.
New Moon
When the Moon is "waxing", it is increasing in visible size. This is between the new moon to the full moon. When the Moon is "waning" it is decreasing in size, from the full moon to the new moon.
It takes about two weeks for the moon to wax from a new moon to a full moon. During this time, the visible portion of the moon increases each night until it reaches full illumination.
The period between a full moon and a new moon is approximately two weeks, known as a lunar cycle. During this time, the moon transitions from being fully illuminated to completely dark before beginning to wax again.
The time from one full moon to the next ... or between two occurrences of any phase of the moon ...is 27.32 days.
Almost 4 weeks.
A solar eclipse can only occur at the moment of New Moon. Two weeks after that moment is about 18 hours before Full Moon.
New Moon
4
full moon is every 27.5 days
The full lunar cycle is roughly 4 weeks, and from full-moon to new-moon is half the cycle, so it would take (roughly) 2 weeks to go from full to new moon.
When the Moon is "waxing", it is increasing in visible size. This is between the new moon to the full moon. When the Moon is "waning" it is decreasing in size, from the full moon to the new moon.
The full lunar cycle is roughly 4 weeks, and from full-moon to new-moon is half the cycle, so it would take (roughly) 2 weeks to go from full to new moon.
14ish days
14.77 days
About 7
About 2 weeks.