02/26/2013 12:19 pm ET Updated Feb 26, 2013

MAKER Sheryl Sandberg On Being Home For Dinner: 'I Wasn't Running Around Giving Speeches On It' (VIDEO)

Sheryl Sandberg, the Chief Operating Officer of Facebook, leaves work every day at 5:30. She has done that since her children were born -- her son in 2005 and her daughter two years later -- but she only began to speak of that publicly quite recently. She explains why in the video above, a clip from the upcoming documentary MAKERS, which takes a look at some of the most pioneering women in history.

Sandberg, whose first book, Lean In: Women, Work and the Will to Lead will be published next week, says she never hid the fact that she was home every night for dinner with her family, but she didn’t actually broadcast it, either. “I certainly wouldn’t lie,” she says, “but I wasn’t running around giving speeches on it.”

Instead, she was also making sure to show “everyone I worked for that I was working twice as hard,” she says, so that no one could accuse her of slacking by heading home early. “I was getting up earlier to be sure they saw my emails at 5:30,” she says, and “staying up later to make sure they saw my emails late.”

Only in the past year or two, she says, does she feel “confident” enough to say “very publicly, internally and externally,” that she is out the door at an hour that most in Silicon Valley consider mid-afternoon. Find out why she started speaking out in the video above, and tune in for the entire MAKERS film tonight, Feb. 26 at 8 p.m. ET on PBS.

Rachel Simmons On Why Young Girls Can Be So Aggressive
Amanda Haas On Helping Families Cook And Eat Together