Which of these are complete sentences? Check all that apply.

The date of the Chinese New Year is determined by a lunisolar calendar.
A lunisolar calendar shows the moon phase and the solar time of year.
Usually on the second new moon after the winter solstice.
A public holiday in many countries with large Chinese populations.
It is traditional to light fireworks on the first day of the celebration.
Due to concerns about fire hazards, some regions have banned fireworks.