thus causing a poor carrying capacity if it is designated to construct large buildings to make it as a farm. Time zone In 1963 by Presidential Decree No. 243, the city entered into the Central Indonesian Time (WITA) zone (GMT+8). On 1 January 1988 by Presidential Decree No. 41, West Kalimantan (together with Central Kalimantan) moved back 1 hour from the Central Indonesian Time (WITA) zone, to the Western Indonesian Time (WIB) zone. As such, in 1988 the city of Pontianak celebrated the New Year twice: at 00:00 on GMT+8 and then 00:00 on GMT+7. Climate Pontianak features a tropical rainforest climate under the Köppen climate classification (Af) with no distinct seasons at all and with heavy to very heavy rainfall year-round. The city experiences a large amount of rainfall throughout the year, averaging of precipitation annually. Only in the month of July and August does the average monthly precipitation fall below . Temperatures are consistent throughout the course of the year, with average high temperatures of and average low temperatures of . Administrative divisions Pontianak City comprises six administrative districts (kecamatan), listed below with their areas and their populations at the 2010 Census and the 2020 Census, together with the official estimates as at mid 2021. The table includes the number of administrative villages (kelurahan) in each district, and its post code. The first four of the above districts lie on the south bank of the Kapuas River (listed from west to east), while the last two districts lie on the north bank (the East and North districts are separated by the Landak River, which joins with the Kapuas Kecil River at this point to create the Kapuas Besar River). The built-up or urbanized area continues southeastwards along the south bank of the Kapuas River into the town of Sungai Raya, comprising several kecamatan in the Regency of the same name. Demographics The 2010 census enumerated Pontianak's population at 554,764; the latest official estimate (from mid 2019) is 646,661. Population is an important element in urban and regional planning. In the funding, the elements of the population among others are needed to calculate the land needs, the needs of facilities and utilities of a region, predict the movement of transportation, and provide an overview of the characteristics of a region. Important aspects of the population in its link with planning are population size, population distribution and population composition. Researchers