Peak timing: effect of sampling of the mobility network limited to the top 500 airports. Difference in the median peak weeks in the reference stochastic forecast output (SFO) set, where the full mobility dataset was considered, and the top 500 scenario, for the 500 busiest airports, as a function of the median peak week in the reference SFO set. Dots are color-coded according to the corresponding airport's climate zone. In the inset, we show the box plot indicating the distribution of the differences (in days) between the peak week of the reference SFO set and the SFO set considering only the top 500 airports. The differences were considerable, with median differences of about 3 weeks.