On this day, February 18, in 1565 Miguel Lopez de Legazpi claimed Samar for King Felipe II of Spain.
The official calendar of the Republic of the Philippines: an almanac of Philippine commemorations enlivened with illustrations and information. –Manila: Presidential Communications Development and Strategic Planning Office, [2014].
On this day in 2010, Wikileaks began releasing secret US government documents.
https://www.britannica.com/on-this-day/February-18
On this day in 1913, Frederick Soddy introduced the word “isotope” to refer to the different forms that can be the existence of an element as a result of its radioactive transformation.
https://www.todayinsci.com/2/2_18.htm
February is Philippine Marathon for the Pasig River Month (Proclamation No. 780, s. 2005).
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