Source-backedFixed AnnualIn-depth guide
Constitution Day of the Republic of Indonesia
Indonesian government statistical-agency pages identify 18 August as Constitution Day of the Republic of Indonesia and describe it as an annual commemoration.
Country observance hub
Indonesia observances
3 source-backed records whose verified scope explicitly identifies Indonesia. This is an observance index, not a public-holiday calendar.
Country-specific observances
Indonesia observance library
Source-backedFixed AnnualIn-depth guide
Hari Pramuka
Indonesian government coverage marks Hari Pramuka on 14 August and connects it with youth character, leadership and service
Source-backedFixed AnnualIn-depth guide
Independence Day / Proclamation anniversary
Indonesia State Secretariat and official presidential holiday regulations verify the August 17 Proclamation anniversary, annual state ceremony and national-holiday framework.