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Of the companies in a communications coach's client portfolio, the last one with a sabbatical program was Intel, which allowed one every seven years. She knows of no other client that offers one, so sabbaticals have to be self-imposed.

What stops people is not knowing how to tell the story afterward. People coming off a break, whether after a baby, a layoff, or burnout, often clench up about how to explain it, as if it were a problem on the resume. Listing career break and caregiving is less taboo than it used to be, and that counts as progress.

Her founder clients tend to skip breaks entirely, which is a different game from a long in-house career. One of them watched his startup close last year and was running product at another startup by the time she next heard from him. When she asked whether he had taken any break, he told her he couldn't tolerate it.

Why do unlimited vacation policies lower time off?

With no fixed allotment, employees have no number to use up and no clear sense of what is acceptable. A 2015 analysis by the HR software company Namely found that employees with unlimited policies took about 13 days a year, compared with about 15 under limited ones. Workers often take their cue from managers and coworkers, so if few people leave, few feel able to. A set number of days removes that question.

How does a long break restore a person?

Psychologists Sabine Sonnentag and Charlotte Fritz laid out a model of recovery in 2007 that names four experiences: psychological detachment, relaxation, mastery, and control. Detachment, meaning mentally stepping away from work, is the one most strongly tied to well-being in their research. Short evenings off rarely produce it fully, which is part of why longer breaks are studied separately. The model comes from occupational health psychology.

Where did the sabbatical come from?

The word traces to the Hebrew shabbat, and the idea echoes the seventh-year rest described in the Hebrew Bible, when land was left fallow. Harvard is generally credited with introducing the first formal academic sabbatical in 1880. The practice of one year of leave after seven years of work spread through universities from there. Intel's program of a sabbatical every seven years follows the same pattern.

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