The phrase "major pastime" is correct and can be used in written English.
It refers to a popular or prevalent activity that people often engage in for enjoyment or relaxation. Example: Going to the movies has always been a major pastime for our family, and we make sure to watch at least one new film every week.
Come evening, the major pastime is eating out.
Roller skating was becoming a major pastime in small-town India, part of the new frenzy for competitions of any kind.
"I have," he says, "after deliberation, taken up domestic pigeons". Pigeon fancying, although it sounds a bit silly now, was a major pastime in Victorian England.
Later, travel became a major pastime, and, with her husband and children, she toured much of the United States and more than a dozen countries.
It became a major pastime for wealthy landowners in the American South, and it was common for enslaved people to care for and train the horses and, eventually, to ride them in races.
"For women of retirement age, going on a browsing spree is a major pastime," said Ms. Corlett, who studied women over 50 for fashion clients interested in selling to them.
Ralph's major pastimes are running up and down trees and practising his mating call, which seems to repel the females.
Still, cruising is still a major vacation pastime, particularly among Americans.
More than this, though, the durability of these figures suggests that, along with work, family and shopping, self-criticism may be a major American pastime.
That can be chilling in a town where the two major indoor pastimes each winter are (a) going to the Dome and (b) watching Syracuse on the tube.
The game caught on quickly, and in 1877 the All England Lawn Tennis and Croquet Club, which had been renamed that year to include Major Wingfield's pastime, announced a tennis tournament on its grounds, in the village of Wimbledon, outside London.
