Looks like the incoming A/C was from CLT and arrived about 9 hours late. Presumably, rather than have the flight arrive in the HNL middle of the night they decided to postpone the flight till the next morning, hence the 20 hour delay.
As for what caused the 9-hour delay to crew in CLT, anyone's guess is as good as mine but there were a LOT of canceled flights across the East coast on Sunday and Monday. With a lot of crew out of position and/or timed out due to delays, the number of people sitting short call reserve in CLT, either pilots or FAs, may not have been enough. Long call reserve has something like 12 hours notice to show up so theoretically if they realized they needed those folks 3 hours before the scheduled CLT-PHX flight, that would cause a 9 hour delay.