For day six of Space Week, you will be given a date in the format "YYYY-MM-DD" and need to determine the phase of the moon for that day using the following rules:
Use a simplified lunar cycle of 28 days, divided into four equal phases:
"New": days 1 - 7"Waxing": days 8 - 14"Full": days 15 - 21"Waning": days 22 - 28
After day 28, the cycle repeats with day 1, a new moon.
- Use
"2000-01-06" as a reference new moon (day 1 of the cycle) to determine the phase of the given day.
- You will not be given any dates before the reference date.
- Return the correct phase as a string.
Note: Day 1 represents the day of the new moon, meaning 0 days have passed since the last new moon.