By Final Fantasy XIV: A Realm Reborn will have different music variations for day and night and even for different weather conditions, says the game’s sound director, Masayashi Soken, in a short development blog post. Soken demonstrates the feature by providing a preview of music from the beta that will play in Gridarnia (embedded above). While the pieces of music featured in the track are mostly the same as the the ones heard in a previous walkthrough for the game, Soken points out that tucked between them is a version of the Gridania theme that only plays during the evening hours in the game. 
Final Fantasy XIV: ARR Has Music Variations Depending On Time Of Day, Weather
