"I think, you know, this just reflects that people are excited for the warm weather, feeling good about vaccine and I think just sort of wishing that COVID was over," Arwady said. Last year, cell phone data showed that people across the city were at home throughout the day a little more than half of the time. Once social distancing guidelines and the statewide stay-at-home order took effect, that number jumped to nearly 80%. Arwady said last April that the city was working with health data company BlueDot to use anonymous location data from cell phones across the city to track movements.