Can I say "from March to end-June" to mean "from march to the end of June"? just like you say "from March to mid June"

People would know what you mean, but it’s not common in my experience. “Late June” feels more natural.

(American English) You'd likely be understood, but would not sound native. We use "mid-" on quite a few things, we don't tend to use "start-" or "end-" as prefixes nearly as frequently. Mid-month, mid-week, midday, midnight, etc. But not start-month, end-day, etc. We do say "at month end" or "over the weekend", however.

In the US that would sound unnatural. In very casual, informal conversation you might omit the “the” (“from March to end of June”) but “end June” wouldn’t be used

I'm a native speaker and I've never heard anyone say "end-June." I would say "to the end of June"

No, you could say "From March until late June" which could mean until any time in the last week or two of June or "From March through June" which means all the time up until the end of June.

I would say "from March through June" or "from March until July."

I don't like it. I'd understand it, but I'd grimace. I might even tut. What's wrong with 'the end of June"? Are you paying by the letter?

There is "late June" meaning something is toward the end of the month, but it is more vague and doesnt necessarily mean the last day of June if that is what you are looking for. "June-end" might work as short hand, modeled after the more common phrase "month-end" (I don't really hear that much outside business or finance contexts though). ex: "Pension flows would be heftier if this were quarter-end, rather than 'just' June-end." There is also "thru June" (short for "through June") meaning "up until the end of June", which might be useful (but in formal writing it's better to spell out through usually) But overall, no, it seems we don't have a perfect equivalent. Maybe because "end of June" is only 2 more letters, while "middle of June" is 5 more. That was a good question. Mid- is also a common prefix people can add to almost any word where it makes sense and people will know what it means. For some reason we don't have an "end" equivalent that I can think of.

People would get what you were trying to say, but “end **of** June” is what usually goes

end-June is not e a phrase like mid-June. You would need to say “end of June.“

This is, like, corporate speak. You wouldn't use it in most conversations, but you may hear it or even read it in financial contexts. Like, "How much did we sell from March to end-June?" This is different from "March to late June" because "late June" could mean something like June 27, while "end-June" specifically means June 30.

from March to the end of June or maybe from March through June

If it’s all of March, April, May and June then the most concise way to say it is: March through June

I mostly agree with the other answers, but let me add another piece: In business writing, I will often write "from March to EOM June", where EOM is an abbreviation for "End-of-Month" and is very specifically used to mean "this will include every day of June, but no days from July". This would be uncommon outside of a business context.

I would say either “from March to late June” or “from March to the end of June”

Here's where I would use "through" instead of "to". If you're doing something *through* June, that means it will last until the end of June, where "to" implies that it ends on or before the date/month specified.

I’ve never heard “end-June” before. It’s very much not a thing where I live or went to college. Mid-June or late June would be the natural phrasing.

You'd usually use "from the beginning of .... until/to the end of ...."