Mayday

[Hina Muqadas]

Some people may be wondering why anybody would yell May Day when they are in trouble. Here is why:

It derives from the French maidez, pronounced mayDAY, and means literally help me.

[Sommer]

international distress radio code word, when using voice transmission
[SOS] is the morse code version
MAYDAY is reconized internationally as an emergency code on any type of radio system, and should be taken seriously.

[Jessica]

Mayday (Wu Yue Tian) is one of the most popular rock bands of Taiwan. Its members are Ashin (lead vocalist), Masa (bass), Ming (drummer), Monster (guitar), and Stone (guitar).

[Jessica]

It is an emergency procedure word used internationally as a distress signal in voice procedure radio communications. It derives from the French venez maider, meaning come help me.
It is used to signal a life-threatening emergency primarily by mariners and aviators but in some countries local organisations such as police forces, firefighters, and transportation organizations may also use the term. The call is always given three times in a row (Mayday Mayday Mayday) to prevent mistaking it for some similar-sounding phrase under noisy conditions, and to distinguish an actual Mayday call from a message about a Mayday call.
A mayday situation is one in which a vessel, aircraft, vehicle, or person is in grave and imminent danger and requires immediate assistance. Examples of grave and imminent danger in which a mayday call would be appropriate include fire, explosion or sinking.
Civilian aircraft in the UK and Europe are encouraged to use the following format:
MAYDAY, MAYDAY, MAYDAY; Name of station addressed; Aircraft callsign; Nature of emergency; Intentions of the pilot; Present position (including Altitude or Flight level); Pilots qualifications; Any other useful information (number of souls on board.)

[Renato]

One who makes no sense and blurts out random things no one els understands. Also a [mayday] gets really angry when you correct him

[Little_Girl]

Day of international resistance and solidarity against capitalism.
Originally a day of carnivalesque suspension of the social order of work and control, prevalent among peasant communities in mediaeval Europe. A continuation of earlier pagan festivities which continued in a syncretic way during the Christian era, with rituals such as the maypole retained. (This was originally a pagan fertility ritual).
It became a focus of international resistance for two reasons: firstly, because the campaign for Mayday to be made into a holiday was an important early campaign of the workers movement, and secondly and more importantly, because of the Haymarket martyrs, anarchists stitched up over a bombing at a protest.

[PussyCat]

Not sure about this one but possibly from the French maidez or Help Me!

[Julene]

Mayday in Ballooning. The international distress call.

[Tariq Zaki]

An international radio distress signal used by ships and aircraft.