Because a Javanese lunar year is between 11 and 12 days shorter than a civil year, it begins 11–12 days earlier in the civil year following the civil year in which the previous Javanese year began.
Due to the difference of 11 to 12 days between a Javanese lunar year and a civil year, this new Javanese year begins approximately 11–12 days before the start of the following civil year, which aligns with when the previous Javanese year commenced.