Why are people (specifically, tv news reporters) using the phrases "on yesterday" and "on tomorrow"?
605471
Do they?  I'm not watching any english news reports so haven't noticed it.  Grammatically speaking, it is incorrect.  You use the preposition on before specific names of days or dates, like on Monday, or on May 25, but it does not sound right when you say on tomorrow or on yesterday(you can use for before tomorrow and yesterday).  Yeah, it can get annoying, but we have to accept that languages undergo a lot of changes, these also evolve or become extinct like living things, as it is mixed with other languages or when it is spoken by other ethnicities. There is the emergence of a distinctive language spoken in a certain region, like Singlish in Singapore or tag-lish in the Philippines, or maybe Hin-lish in India(they have their own english expressions that you can only hear from that place) Even for British and American English, there are marked differences and so with Australian.  And with the advancement of technology, it can get worse.  Just notice how the young generation seem to have their own english language and spelling.  People nowadays don't even bother with proper spellings.  As long as it sounds the same, it is okay, which can be another pet-peeve for some people.  Maybe in a few years, we'd be speaking in sms language.  \n\nFor the meantime, what you can do is to write to these TV stations and point out about their mistake and maybe they will rectify it.  But don't get too upset about it. It's the natural progression of things in this world.
74292
How about  tomorrow? Tomorrow is tomorrow, but when tomorrow gets here, its today not tomorrow anymore.
474465
Have the media report facts rather than running headlines.  The media can spin a story from it's original true meaning in the headline alone.
111517
Seems to be unknown. Can't find any single person credited, so maybe the term just came into popular use around the same time (journalists?). \n\nMaybe look for the earliest use of that term, going back to summer 1929 (predating the Wall Street crash by a few months).\n\n(Does anyone have access to WSJ.com archives, do they go back that far?)
261201
nope\n\nyesterday is used when you speak direct speech\n\nthe day before is used when speaking indirect/reported speech
456323
LAY AND LIE IS TOP ON THE LIST EVEN NATIVE SPEAKERS FAIL AT USING THEM...\n\nLAY, LAID, LAID\nLIE, LAY, LAIN\n\nYesterday, she lay down for an hour.  But native speakers sometimes say 'she laid down'... WRONG!  But they say it.\n\nShe has lain down everyday for the two past weeks.  And again, a native speaker might say 'she has laid down' WRONG!  But some say it.\n\nIf you say: 'Yesterday I laid down' That's wrong!  Yesterday I lay down. (<---- CORRECT...)\n\nTRANSITIVE & INTRANSITIVE THAT'S THE QUESTION!
1050646
Because they're pronouced differently\n\nWahn vs. won
506850
So they can start at the start of the weekend. Yeah I know people claim Friday starts the weekend, except most people work during the day Friday. So the work week starts Saturday and ends Friday, hence the TV Guide systerm.
874261
Definitely past tense. You will make statements about things that "have happened" in the past, as opposed to things that "are happening" in the future.
325074
This is used in the Arabic language as a stress on the certainty of the issue. God knows what is going to happen, and His knowledge is beyond he boundaries of time, so for Him these are facts. An example of this language usage is when I say that we are all dead, since there is no doubt that every human being is going to die.\n\n**Check surat Al-mu'minoon (ch.23) from verse 99 forward. There is no coming back.
36610
'I am hungry \nEats your hand \nKeeps the other for tomorrow \nAnd your head \nFor the days of party.'\n\nYes, this doesn't make much sense in that order, but different languages use words in different orders than other languages.
1056777
To answer a part of your quesiton, the media plays to the flavor of the week crowd.  They care not the validity or weight of a story.  The only relevant thing to news media is telling the news that sells subscriptions/viewers/readers.
879586
=it drives me crazy as does the word "clearly.  It should have expired a couple of years ago but it is still going strong. It is used often in the news as well!  I can appreciate what you are saying.
732068
English is very subtle and prepositions are very tricky.  You could also have said "I am disappointed by the news" if that had been offered as an alternative.\n\nI think that it is "at" in this case because you are confronting the news and you don't like what you see.\n\nIf you are disappointed "with" something, it means that you were expecting better and received something not up to expectations.  "I am disappointed with my results."  "I am disappointed with my present."\n\nIf you are disappointed about something, it means that you are not quite so intimately involved with it.  "I am disappointed about the way in which the government is running this country."\n\nIf you say you are disappointed in someone, then you feel let down by that person.  "I am disappointed in you, Harry.  I expected better of you!"\n\nKeep reading good books in English and note the uses of prepositions.  They are very tricky indeed and even native speakers have to stop and think sometimes!
697334
In my country (United States), television rules as the premier medium for disseminating news. News Channels like CNN, MSNBC, Fox news have created a nonstop 24 hour news cycle.\n\nTaking an Asian country like India, TV channels are emulating the American model and are creating 24 hour news cycles.  Their reach is not as much as the American channels but they are getting there.\n\ncc
148407
That was day before yesterday.
1174412
I don't know about where you are from, but here in England we usually have a warning just before the news telling us that some scenes may be upsetting, that is only helpful though if we see the news right from the start. I do think that news like that should only be shown after the 'watershed' about 9pm.