Major events in the life of an individual would include the age of puberty and marriage; the birth of any children; death of a spouse, parent, sibling, or other significant person in that person's life; migration to another region or country; major illnesses; and the onset of physical incapacity in old age. Some would add major events connected with employment, such as getting a job, redundancy or unemployment, any return to further education in adult life, or changes of employer or occupation; others would treat these as secondary events. Life-events constitute significant turning-points in a person's life, in the roles and activities they are encouraged to adopt, and the groups they interact with, and may be associated with changes in attitudes and values.
"life-event." A Dictionary of Sociology. . Encyclopedia.com. (December 10, 2018). https://www.encyclopedia.com/social-sciences/dictionaries-thesauruses-pictures-and-press-releases/life-event
"life-event." A Dictionary of Sociology. . Retrieved December 10, 2018 from Encyclopedia.com: https://www.encyclopedia.com/social-sciences/dictionaries-thesauruses-pictures-and-press-releases/life-event