Flour bombing' is an established April Fool's Day practice in Portugal and some other countries.
Hilaria was held shortly before 1 April during the March equinox and as the name implies featured a lot of joking and merriment.
The fake report by an Israeli intelligence officer that an assassination had been attempted on a prominent Muslim leader was initially taken seriously by the Israeli parliament and media before learning it was a hoax. This act resulted in said officer being interned for 35 days.
Easter, which occurs on the Sunday after the first full moon on or following the vernal equinox, sometimes coincides with April Fool's Day. The last time this happened in the 20th century was in 1956. The first time it happened in the 21st century was in 2018.
Answer: A Noodle
Outside of being labeled a "noodle", victims of April Fool's pranks in England may also be called a "gob", "gobby" or "noddy".
Though not known to the outside world for their sense of humor, Iranians also get down on April Fool's Day and disclose pranks with the phrase "Doroughe sizdah", which roughly translate to "lie of 13".
Answer: Lion Washing
A well-known historical gag involving the Tower of London featured outsiders being invited within to witness the washing of lions.
December 28th, which also marks the observance of "Holy Innocents Day", is a traditional day for pranking in Spain and several parts of Latin America.
Gmail was launched on 1 April 2004. At that time, many people thought it was a hoax for a webmail service to offer a whole gigabyte of free storage.
Answer: The Liberty Bell
On April Fool's Day 1996, Taco Bell put out a full-page advertisement in a number of leading newspapers to announce they had purchased the Liberty Bell (in name of reducing the nation's debt) and renamed it the "Taco Liberty Bell".