Some people call February 9, 2024 the last "New Year's Eve" in recent years. This is a normal phenomenon caused by the laws of the Chinese calendar.
Gregorian calendar sets up a leap year every four years, adding 1 day at the end of February. The lunar calendar defines months according to the waxing and waning cycle of the moon. The appearance of large and small months is not arranged at intervals, so there may be several consecutive large months or several consecutive small months.