This week, millions of people will be celebrating Chinese New Year.
Chinese New Year will begin on Tuesday 5 February 2019.
The reason the new year falls at this time is because it marks the start of the lunar new year, which is when there is the start of a new moon.
This is different to the 'Gregorian' calendar which always starts on 1 January.
Because it depends on the moon, the date of Chinese New Year actually changes each year, but it will always fall some time between 21 January and 20 February.
Watch this video if you want to know more about this celebration
By Victor, Sara & Mayra