480 weeks ago from today was 29 Oct 2015, a Thursday. Anytime we’re subtracting halves of the year, we need to ensure that we’re still in 2025. It looks like 480 weeks from now will bring us back to pre 2024 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 3360 days on a calendar until getting my solution of Thursday October 29, 2015.
All of our day calculators are measured and QA'd by our engineer. Read more about the Git process here. But here's how 480 weeks ago gets calculated on each visit:
480 weeks is Thursday October 29, 2015 or could be if you only want workdays. This calculation takes 480 weeks and only subtracts by the number of workdays in a week. Remember, removing the weekend from our calculation will drastically change our original Thursday October 29, 2015 date.
Work weeks Solution
Monday
Tuesday
Wednesday
480 weeks back
Thursday
October 29
Friday
Saturday
Sunday
Counting back from today is Thursday October 29, 2015 using a full calendar, and is also 80640 hours ago and 82.74% of the year.
Thursday Thursday October 29, 2015 was the 302 day of the year. At that time, it was 82.74% through 2015.