Call for help.

The symbol of Mayday is full of youthful enthusiasm.

On the other hand, mayday is an air call for help.

There is also a version of the saying:

Martha of Mayday said: "Mayday" was a nickname when I played BBS in college. At that time, my ID was Mayday, which translated into Chinese means "Mayday". When discussing the group name, everyone had no opinions, so I brought it up and listened to your opinions. Everyone thought it was very good and very musical, so I used Mayday.