On this day, April 18, in 1591, Saint Pope Gregory Xiv issued a decree establishing reparation for the enslaved European Catholics in the Philippines (Bulla Cum Sicuti).
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 1942, the Doolittle Raid occurred when 16 B-25 bombers attacked Tokyo led by Lt. Col. James H Doolittle.
https://www.britannica.com/on-this-day/April-18
Today is the death of Albert Einstein (1955).
https://todayinsci.com/4/4_18.htm
This month of April is Vacation Hazards Prevention Month (Proclamation No. 115-A, s. 1966)
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