Yes, it means "... a message on Wednesday ..." The message was delivered on Wednesday. Wednesday was the day upon which the message was delivered. As you study English you'll notice that native speakers omit words (leave words out of a sentence) A LOT. Really a lot. In this case the word "on" is omitted. Omitting words makes the language that bit harder to understand for folks who don't use it all day every day. But native speakers tend to just get used to what's meant. Most of the time native comprehension comes from recognizing patterns that convey some meaning to the listener; but for actual language learners (who really are looking at the words and the grammar), it's not so easy. Hope that helps!

You mean "why do native speakers pronounce". And the answer is likely because you're listening to US English rather than UK or Aus/NZ/SA.

There's no easy answer to your question, IMHO, because the thing you're quoting is badly thought-out and written (which is, of course, the norm these days). Btw, "there newr tiltles"? What should that be? :) Anyway, your question is "When the sentence is future tense, "in the last three months" refers to "in the next three months."". My answer is "no". "In the last three months" is always relative to "now". Unless you're very skilled, you can't just mess with what "now" is and expect "in the last three months" to somehow magically parse into something else. You don't provide enough context for me to be authoritative here, but I suspect that the content that you quote should have said "the three months prior."

I agree with Melissa. In the UK, you'd hear people say "as good a place as any". In the US, the "of" creeps in, but I think it's a mistake (along the lines of the way "I could care less" is common in the US, but not in the UK, and actually means the opposite of what the speaker intends, which is "I couldn't care less"). There are lots of errors/additions/omissions/transformations in English as spoken by natives that make it harder to understand than necessary and this is a good example, IMHO. :D

FYI and FWIW, in my social and work circle (large software firm in the Seattle area), people say "FYI" out loud (as well as writing it) all the time. It's as often as not in the form "Hey, just FYI, I'll be OOF tomorrow". They pronounce "OOF" as well (out of facility, meaning out of the office). "Off the hook" in this sense means "very good/impressive/wild". "(to be let) off the hook" can also mean a reprieve, but that's not the sense being used here.

Your "make something of someone/something" is conflating two things. 1. "to make something of yourself" (or "I wanted to make something of myself"), which means to become a success and 2. "what do you make of something?", which means "what is your understanding of something?". They're two different things. 1. "to make something of yourself" and 2 "to make of something", which is always AFAIK used in a question, as in "what do you make of ...".

There are a lot of questions here. Personally, I'd just ask one or two so you don't exhaust people who answer. Here goes. 1. I haven't seen "slick" used to mean sneaky. 2. Saying "you're just like your dad" is very common. Adding the nuance that this is yet another way in which he's like his dad seems like a really uncommon thing to want to say. But if you wanted to add that nuance you might say "You're just like your dad in that way, too." 3. "Have our trip be ruined" is a very common speech pattern, and it's just a way of saying it passively. Think of it as meaning "have our trip be ruined for us". That captures the passivity better. 4."try to be slick/clever", see 1. 5. Get burned means to in some way be injured or harmed. It's using the literal injury of burning in a metaphorical sense. For example if my hotel is cheap because it's in a high-crime neighborhood and/or the hotel has no security, and I have my belongings stolen as a result then I got burned. In fact I burned myself by making a poor choice. 6. "Hotel arrangements" means the arrangements you've made for your accommodations.