Under Constitution Art. 127, elections for local administrations are held every five years. The rule that sets the date is in Law No. 2972, Art. 8: in the fifth year of each electoral term, 1 January is the start date of the election, and the last Sunday of March of the same year is voting day.
The last local election was held on 31 March 2024. Under this rule, the election calendar starts on 1 January 2029 and the regular voting day is 25 March 2029. This date is calculated from the rule in the law; it becomes final when the YSK announces the election calendar.