National Tax Day (Hari Pajak Nasional) is observed in Indonesia every July 14 to commemorate the first mention of taxes in the draft of the 1945 Constitution. This day is often referred to as the "birthday of taxes" in Indonesia. The history of taxation in the region dates back to pre-colonial times when Muslim sultanates collected taxes from their subjects, and it evolved under Dutch colonial rule with the establishment of a modern tax system in the 19th century. The significance of this day lies in the addition of the word "tax" to the constitution during a subcommittee meeting on July 14, 1945, which emphasized that tax collection must be regulated by law. The Directorate General of Taxes (DJP) is the organization responsible for formulating and implementing taxation policies in Indonesia. National Tax Day highlights the importance of taxation for the country's economy and recognizes the contributions of professionals working within the DJP. While it is not a non-working holiday unless it falls on a weekend, it serves to remind citizens of their role in supporting the nation's financial framework.