If you're not hearing back from your US American colleagues today, don't worry - they're off shopping one of the many many sales events.
It's Labor Day over here, and if you'd like to learn more about it, the Department of Labor has a whole website dedicated to today.
Fun fact: After today, wearing white is frowned upon. Why? Probably because "old money" wanted a way to distinguish between themselves and the nouveau riches. As Mental Floss puts it:
Not everyone followed this rule. Even some socialites continued to buck the trend, most famously Coco Chanel, who wore white year-round. But even though the rule was originally enforced by only a few hundred women, over the decades it trickled down to everyone else. By the 1950s, women’s magazines made it clear to middle class America: white clothing came out on Memorial Day and went away on Labor Day.
These days the fashion world is much more relaxed about what colors to wear and when, but every year you will still hear people say that white after Labor Day is unacceptable, all thanks to some snobby millionaires over 100 years ago.
Read the full text here: http://mentalfloss.com/article/12424/why-can%E2%80%99t-you-wear-white-after-labor-day#ixzz2dgpkxEnm