The phrase "mid may" is not a correct or usable part of a sentence in written English. Instead, you should use the phrase "middle of May" or "in the middle of May". For example: "I plan to go on vacation in the middle of May."
First fledgling blackbirds in mid May.
Clinical specimens were collected from 816 children from mid-May 2008 to mid-May 2009.
Everything changed in mid-May.
Performances begin in mid-May.
Mid-May, Tamil Nadu, India.
Mid-May, BBC One.
In mid-May, acceptance letters went out.
The umpires' strike lasted till mid-May.
Ms. Aron arrived in mid-May.
Mr. Talamantes will start in mid-May.
A report is expected in mid-May.
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union