The issue was that the Kalavan CityGardens class GardenerNPC (Sue). Sue always responded with the phrase "Fine day, isn't it?" even during night-time hours.
In order to potentially correct this, I incorporated the DayligtPhase and created conditional statements based on the “dayphase”/amount of light in the game. In turn Sue now appropriately responds with
“Fine (morning/day/evening/night), isn’t it?”