Fig. 3

Time of peak Twitter activity on Sunday night for each state before (top) and the week of (bottom) Spring Forward for the four events observed between 2011 and 2014. Before Spring Forward (BSF), the time of peak activity occurs around 10 p.m. most states in the Eastern Time Zone, and around 9:15–9:30 p.m. for most of the other states. The week of Spring Forward (SF), peak Twitter activity occurs between 0 and 60 min later for each state, with the exception of Alaska, Nebraska, and Hawaii for which the peak occurred earlier. Texas has the latest peak at 10:15 p.m. local time, a shift of 60 min forward compared with prior Sundays. We note again that the BSF estimates are based on the aggregation of four Sundays prior to Spring Forward, while the SF estimates are based on the Sunday coincident with Spring Forward, and are therefore estimated using roughly 1/4 of the data. [49]