Proclamation No. 1503, issued by the Office of the President on 29 September 1975 by order of President Ferdinand E. Marcos, set aside the third week of October as Senior Citizens Week. President Fidel V. Ramos signed Proclamation No. 470 on 26 September 1994, which renamed the observance Linggo ng Katandaang Filipino and moved it to October 1 to 7.
From proclamation to statute
In 2016 an act of Congress named the week directly. The Centenarians Act, approved on 23 June, calls it the annual Elderly Filipino Week, October 1 to 7, and declares the first Sunday of October National Respect for Centenarians Day.
That clause did not invent the week. It fixed the dates in law and hung a new statutory day inside them.


