“…Seasonality of diagnosis of T1D has been extensively studied and reported in both northern 114,122,133,[141][142][143][144][145] and southern hemisphere studies. 31,141,[146][147][148][149][150][151] In many countries, seasonality of diagnosis follows a cyclic, sinusoidal pattern 149 with a peak occurring in cooler winter months, 143,[148][149][150][152][153][154] or late autumn/ winter 122,141,155 and a nadir in spring and summer. 122,143,155 Unlike month of birth, seasonality of diagnosis is now a wellrecognised feature of T1D in childhood.…”