What the history word of " mayday " for use in emergency ? I know this

Question: What the history word of " mayday " for use in emergency !? I know this also for international labor day
Best Answer - Chosen by Asker:

At the time the codeword was established French was still an accepted international language!. 'Mayday' is a phonetic transcription using English spelling conventions of the (ungrammatical) French phrase 'm'aidez', meaning 'Help me'!.

The bad grammar makes me think that the phrase was probably invented by a non-French-speaker: probably English or American!. Correct French, of course, is 'aidez-moi'!.Www@QuestionHome@Com

Actually it has nothing to do with the month of May!. It is an Americanization of a French word with a similar sound but not a similar meaning!.
Venez m'aider is the French expression, or come to my help!.
the m is a contraction of moi, or me, and aider is the French word for to help, or aid!.Www@QuestionHome@Com