Star in calendar

Hi makkalae, I was looking at my calendar and saw some symbols on the day for the calendar I understand the dots as full moon and amavasai but what does the star symbol mean (it's the one on Jan 9) Anyone have any idea?

Hi makkalae, I was looking at my calendar and saw some symbols on the day for the calendar I understand the dots as full moon and amavasai but what does the star symbol mean (it's the one on Jan 9) Anyone have any idea?