810 weeks ago from today was 23 May 2009, a Saturday. Anytime we’re subtracting halves of the year, we need to ensure that we’re still in 2024. It looks like 810 weeks from now will bring us back to pre 2023 and we’ll need to factor this into our subtraction because it will change the calendar and fiscal years. For larger calculations like this, I start by subtracting total days, then counting backwards 5670 days on a calendar until getting my solution of Saturday May 23, 2009.
All of our day calculators are measured and QA'd by our engineer. Read more about the Git process here. But here's how 810 weeks ago gets calculated on each visit:
810 weeks is Saturday May 23, 2009 or could be if you only want workdays. This calculation takes 810 weeks and only subtracts by the number of workdays in a week. Remember, removing the weekend from our calculation will drastically change our original Saturday May 23, 2009 date.
Work weeks Solution
Monday
Tuesday
Wednesday
Thursday
Friday
810 weeks back
Saturday
May 23
Sunday
Counting back from today is Saturday May 23, 2009 using a full calendar, and is also 136080 hours ago and 39.18% of the year.
Saturday Saturday May 23, 2009 was the 143 day of the year. At that time, it was 39.18% through 2009.