This event is a "Super Event" in Bug Business that ran from Feb 15 to Feb 18, 2017.
"Build the Wolfram Hotel and make the residents of your city happier! Obtain and install the Wolfram Hotel by fulfilling these conditions:"
Event duration: 4 days
Event reward: Wolfram Hotel
Event tasks, all platforms Edit
Resource requirements to complete the event are different for each player. The screen shot below is only a sample from one player.