Rachel Zoe cast her vote on Monday after running errands with her darling son Kaius, and we noticed that the celeb stylist was wearing all white. As it turns out, not only did her choice in apparel show her support for Democratic presidential nominee Hillary Clinton, but there is a pretty significant historical meaning behind it. (And no, it wasn't a coincidence, because this went up as a blog post on The Zoe Report!)

Clinton supporters have been using social media and hashtagging photos of themselves with #wearwhitetovote, which is the official color of the U.S. women's suffrage movement. The U.S. movement took place in the early 20th century, but this fashion statement first made history in 1908 when the Women’s Social and Political Union in Britain chose three colors to unify participants during a demonstration in Hyde Park: white for purity, purple of dignity and green for hope.

Clinton wore white to the final night of the Democratic National Convention and at the third and final presidential debate -- but we had no idea until recently that was why. Now we know!

Tomorrow is election day and you know what that means 😉 I voted and so should you ❤️ XoRZ

A photo posted by Rachel Zoe (@rachelzoe) on