https://www.theregister.co.uk/2018/07/30/end_of_season_smartphone_roundup/

I call it the "Phone Season". It's the glut of new smartphones that begins with splashy launches at Mobile World Congress in Barcelona and ends in late spring. Phone Season defines what phones look like each year.

Apart from Apple (which introduces its new models in September) and Google (in October), and the odd mid-year refresh, this really is peak season.