This question already has an answer here:
Does the following sentence make any sense?
"It was dark by now, and I realized that it was time to [...],"
If it was an occurrence in the past, then wouldn't referencing it as "now" be contradictory? Or are there specific use cases where it works for narration? I'm writing a first-person story, and the character is sitting by a campfire reflecting on the day's events leading up to "now". Or "then" (?).
If it's in the past tense, then, "It was dark by then", or "By that time it was dark", would work better, but it seems to lack the same meaning.
Same goes with a sentence like, "I looked over to John, who was currently ignoring me."