Answer: Gmail
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: Fool's Errand
A fool's errand is a common April Fool's Day prank, such as sending a person to search for something that doesn't exist.

Answer: Burger King
Burger King released an ad for the fictitious "Left-Handed Whopper" on April Fool's Day of 1998, upon which reportedly thousands of customers went to their stores requesting the sandwich.

Answer: Lion Washing
A well-known historical gag involving the Tower of London featured outsiders being invited within to witness the washing of lions.

Answer: Ray J
Ray J and his wife, Princess Love, did eventually give birth to a bouncing baby girl on 23 May 2018.

Answer: BBC
This was done by the BBC in 1957, which they had to later recant the tale of plants that grow spaghetti due to the large amount of people who believed the hoax.

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".

Answer: Israel
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.

Answer: Flour
Flour bombing' is an established April Fool's Day practice in Portugal and some other countries.

Answer: 1st
April Fool's Day is always held on the 1st day of April, regardless of which day of the week that date may fall on.