May is just a calendar month. You will need to provide more details for me to figure out exactly what you're asking here.
I hear so much talk like "mays coming i got to get more backlinks can't talk" what is there like an update I'm not seeing? lol I'm so lost
It's probably people just refering to the last Page Rank update at the end of April (around the 28th) which means that Google re ranks sites for the efforts in the last 3 months. So people saying "Mays Coming" probably refers to the fact that they have been working hard in April to try and sqeeuze out as much SEO and backlink building as possible before the month of may appears