It was Diwali vacation in India. It looks like the managers were not able to force everyone to walk around with their laptops and pagers hanging from their necks and waists, respectively, which they normally do.
If there's one thing I have learned from my Amazon mates, then that is they never have a true time off. Hills, beaches, a marriage in the family— no exceptions. It's so pervasive that I can't really imagine it to be voluntary, and my friends' answers on this topic have never been clear.