1. "Black May"
This is a literal translation, but it is not a common phrase in English and likely wouldn't be used except in a very specific context, like a historical event or a literary work.
2. "May (month) is black"
This translation might be used to describe a particularly bad or unlucky May, perhaps due to bad weather, a tragedy, or other misfortune.
3. "The black May (referring to something specific)"
This could refer to a specific event, like a black market in May, a black cloud that appeared in the sky in May, or something else that is associated with the color black and the month of May.
4. "The mother of black (referring to something specific)"
This is a more figurative interpretation, but it could be used to describe something that is the source or origin of something bad or dark, like a particular event or a person.
Without more context, it's impossible to know exactly what "kala mai ke" means. If you can provide more information about the situation where you heard this phrase, I can give you a more accurate translation.