"how about monday?"
Yep, Monday would be good.
Tuesday also OK .. or Wednesday etc etc.
"... so also will it be in the days of the Son of Man."
In other words this refers to "now" since we are as much "the son of man" as any man .. including Jesus.
That's the whole point.
Well, perhaps not the whole point, but quite significant.
If you're serious then better not to waste time imagining these "foretold" times refer to the future.
