The 2002 reference grammar by Huddleston and Pullum et al., The Cambridge Grammar of the English Language, would consider words like yesterday, today, tonight, and tomorrow as pronouns (specifically, deictic temporal pronouns). Related info is in CGEL pages 429, 564-5.
word choice - 'Today afternoon' vs 'Today in the afternoon'? - English ...
word choice - It's raining today or it's rainy today? - English ...
Yahoo: Joel Osteen Reacts to Druski’s Viral Megachurch Skit: 'I Thought It Was Funny'
Joel Osteen Reacts to Druski’s Viral Megachurch Skit: 'I Thought It Was Funny'
Chron on MSN: Joel Osteen says people 'make stuff up' about his wealth, defends Ye
Joel Osteen says people 'make stuff up' about his wealth, defends Ye
The phrases " on tomorrow," " on today," and " on yesterday " are commonly heard in the southern region of the United States. They are acceptable in casual speech and other informal contexts, but should not be used in formal contexts such as academic writing.
american english - Origins and history of "on tomorrow", "on today ...
Today means "the current day", so if you're asking what day of the week it is, it can only be in present tense, since it's still that day for the whole 24 hours. In other contexts, it's okay to say, for example, "Today has been a nice day" nearer the end of the day, when the events that made it a nice day are finished (or at least, nearly so).
Today Was vs Today Is - English Language & Usage Stack Exchange
3 “Earlier today” is a totally correct way to refer to a point in time between the beginning of the day and the current time. Because it refers to a moment in the past, it can be used with the past tense, as you did in your example.
Two other options (in addition to "as from today," "from today," and "effective today") are "beginning today" and "as of today." These may be more U.S.-idiomatic forms than British-idiomatic forms (the two "from" options have a British English sound to me, although "effective today" does not); but all five options are grammatically faultless, I believe.
Which is the correct (or more correct) expression: By the end of today By the end of the day My context is a promise to send an email today (i.e., before tomorrow).
"By the end of today" or "By the end of the day" [closed]
The last example means something different, though. “What day is (it) today?” refers to the day of the week, not the date.
No meetings scheduled today vs No meetings scheduled for today. When we want to specify that the statement which is talking meetings about to happen that day. Which one to use?
grammar - No meetings scheduled today vs No meetings scheduled for ...
Neither are clauses, but "today in the afternoon" is grammatical (adverbial phrase of time), while "today afternoon" is not. I would also suggest "this afternoon" as a more succinct and idiomatic alternative to "today in the afternoon".
questions - "In which shift are you today? or In which shift you are ...
Which of the following is grammatical? What date/day is it today? What date/day is today?
It's raining today. Raining is a verb, describing the action of rain. It's rainy today. Rainy is an adjective, describing what the weather is like today. Sunny and cloudy are also adjectives that describe the weather, so for parallelism, it makes sense to say "It's rainy today" if you would otherwise write "It's sunny today."
"We never tried to have a big church," Osteen said, when giving back story on the origins of his Lakewood Church.
"I never owned a jet, I never owned a yacht or a fleet of cars," Osteen told Logan Paul.