A young man with cancer at our Silicon Valley firm requested additional sick time for post-cancer treatments and checkups.
Another employee, one who had been born in Vietnam and came to this country with his parents, requested one day per month when he would work remotely. He would return to Los Angeles to work a double shift at his parents' liquor store. This meant that his parents could take a brief break from their 16-hour days.
More often than not, the unspoken rules of "killing it" in Silicon Valley might prevent people like these from even mentioning their needs to their managers. If you're not sleeping under your desk, you're not committed - an attitude we sometimes refer to as "martyr capitalism."