Issues:
* "Few days to go" is awkward phrasing. It's better to say "a few days left" or "a few more days"
* "June will be ended soon" is grammatically incorrect. The correct phrasing is "June will soon be over" or "June will soon end."
Corrected sentence:
* "A few more days left before June ends."
* "June will soon be over."
You could also combine the two sentences for a more concise statement:
* "June will soon be over, with just a few days left."