Is Jakarta's Birthday Really on 22 June? The Answer Is Unexpected
Every 22 June, Jakarta celebrates its anniversary. However, not many know that the date of 22 June 1527, long considered the city’s birthday, does not actually come from a historical source that explicitly records the founding of the city.
Citing the official website of the DKI Jakarta Provincial Government, 22 June 1527 serves as the benchmark because it commemorates the success of Fatahillah’s forces in seizing Sunda Kalapa and renaming it Jayakarta.
The problem is that no historical document has been found to date that definitively states when the name Sunda Kalapa officially changed to Jayakarta. The designation of 22 June as Jakarta’s anniversary actually originated from research by historian Sukanto, published in the book Dari Djakarta ke Djajakarta in 1954.
In the early 1950s, Sukanto sought to determine when Sunda Kalapa became Jayakarta. He estimated the change occurred on 22 June 1527 based solely on conjecture about the harvest season calendar and a rough calculation of the days following Fatahillah’s attack on Sunda Kalapa. He himself acknowledged that he could not ascertain the exact day.
Sukanto stated, ‘Considering what has been described, namely that the first season falls in June (the harvest month or the month after harvest), we think it is quite likely that the name Jayakarta was given on the first day of the first season, which is on 22 June 1527. We cannot determine the exact day.’
Despite this, the research findings were accepted by the Temporary City Council of Djakarta Raja. On 23 February 1956, the institution officially designated 22 June 1527 as Jakarta’s birthday through a formal decree, which has since become the basis for the city’s anniversary celebrations to this day.
This designation has long drawn criticism from a number of historians. They argue that the basis for choosing 22 June is too speculative because it is not supported by explicit written evidence.
Citing research titled ‘Hari Jadi Kota Jakarta’ (2009), one figure with a differing view is Indonesian historian Hoesein Djajadiningrat. He once suggested that a more appropriate date for Jakarta’s anniversary would be 17 December, based on his interpretation of available Portuguese sources. However, this view is also merely conjecture.
As a result, nearly five centuries after its birth, Jakarta’s founding date remains a question mark. There is still no official document stating that Jayakarta was officially established or that Sunda Kalapa officially changed its name on 22 June 1527.
In other words, the Jakarta anniversary commemorated each year is not a date derived from definitive historical evidence, but rather the result of an interpretation that was subsequently agreed upon and institutionalised by the government.