What the day logo
What the Day
LearnPracticePlayDailyGuides
Sign in
LearnGuidesPracticePlayDaily challengeLeaderboardAboutContactPrivacy
Copyright © 2026 Jesper Kiledal
All rights reserved
☕Buy me a coffee
What the day logo
What the Day
LearnPracticePlayDailyGuides
Sign in

August 1, 1806 was a
Friday

August 1, 1806 was a Friday — that’s 80,301 days ago. Below you can see exactly how to work the weekday out in your head with the Doomsday algorithm, along with a few other facts about the date.

Weekday
Friday
Day of year
213 of 365
ISO week
Week 31
Leap year?
No
Zodiac sign
Leo
Days ago
80,301

How to solve: August 1, 1806

  1. 1
    Century anchor1800s→Friday (5)
    Practice →
  2. 2
    Divide by 126 ÷ 12→0
    Practice →
  3. 3
    Remainder of 126 % 12→6
    Practice →
  4. 4
    Divide remainder by 46 ÷ 4→1
    Practice →
  5. 5
    Year's doomsday(5 + 0 + 6 + 1) % 7→5 → Friday
    Practice →
  6. 6
    Month doomsdayAugust→8th
    Practice →
  7. 7
    Distance1 − 8→-7
    Practice →
  8. 8
    Final answer(5 + -7) % 7→5 → Friday

On this day in history

  • 1981MTV launches
  • 2008Airbnb is founded

Related dates

Day beforeJuly 31, 1806 — ThursdayDay afterAugust 2, 1806 — SaturdayOne year earlierAugust 1, 1805 — ThursdayOne year laterAugust 1, 1807 — Saturday
Want to be able to do this for any date in seconds? Read the guide or practice the algorithm.
Did you know? Did you know that 'Black Friday' refers to the day after the U.S. Thanksgiving, which marks the beginning of the Christmas shopping season?