A blink of an eye compared to the winter break between 1950 and 1951, for example: the first two championship seasons. Back then, the off season lasted more than 30 weeks, between Monza on September 3 and mid-May, which is when the Swiss Grand Prix happened that opened the 1951 season. But even without going back that far, there was a four-month break in the 1980s. Between the 1987 Australian Grand Prix and the tests before the 1988 Brazilian Grand Prix there was a gap of 124 days, for example.
With the current calendar of 20 or 21 races, there’s little time to draw breath, compared to the calendar of 15 or 16 races 30 or so years ago. But Formula 1 history is always full of exceptions. Many times in the past there were races in the depths of winter, sometimes still with a long break before the start of the bulk of the season. They were nearly always outside Europe, prior to the start of the European season and its rhythm of a race every two weeks or so.
In 1953, for example, the Argentinian Grand Prix made its world championship debut – on January 18. The next race of the season at Indianapolis would not take place until May 30, before the European season began. The Buenos Aires race was a regular fixture until 1960, followed by a break until 1972, when the race returned to the calendar on January 23.