Weeeellll, actually... It's not exactly 52 weeks! I know, I know, your whole life has been a lie. 😱 The truth is, a year is actually 52.1429 weeks long. Why this weird number? Let me explain...
You see, Mother Nature wasn't too concerned about making our calendars nice and neat when she set up this whole Earth-going-around-the-Sun thing. When we divide the 365 days ℹ️ in a year by 7 days in a week, we get this awkward number with decimals ℹ️.
Even the 365 days we use for our calendars is a tiny white lie - a complete orbit is actually 365.242190 days!
At this point, you might be wondering what other mathematical truths your elementary school teachers kept from you... 😅
365/7 equals exactly 52.142857142857... with the decimals 142857 repeating forever!
That's how we've ended up with 52 weeks and this extra 0.1429 weeks (which is just plain old 1 day), which makes your birthday move forward one day each year and causes years to start on consecutive days of the week.
And just when you think you've got it figured out, every four years we throw in a leap year with an extra day, because apparently keeping time isn't complicated enough! These overachieving leap years have 52.2857 weeks - that's 52 weeks plus TWO whole days, which makes the following year start two days later in the week instead of just one.
Even though we know it's actually 52.1429 weeks, most of us stick with saying "52 weeks in a year" because, let's face it, no one wants to be that person who corrects everyone about decimal points. Plus, most of our modern world runs on the 52-week schedule - from business quarters to TV seasons to school terms.
So next time someone asks you how many weeks are in a year, you can either be cool and say "52" or be the actually-technically-well-kind-of person and explain the whole 52.1429 thing. Choose wisely! 😎