15 months before today was 20 Feb 2023, a Monday. Subtracting 15 months in the past is usually just counting from May; however, longer calculations will push us from 2024 into 2023 or further. Even if the calculation remains within the year, I usually take note of the 20 days left in the middle of May to prep for an additional calculation before April. But that’s all there is to it - understand the month, if 15 months will change the year, season, or fiscal calendar, and subtract your dates.
All of our day calculators are measured and QA'd by our engineer. Read more about the Git process here. But here's how 15 months ago gets calculated on each visit:
15 months is Monday February 20, 2023 or could be if you only want workdays. This calculation takes 15 months and only subtracts by the number of workdays in a week. Remember, removing the weekend from our calculation will drastically change our original Monday February 20, 2023 date.
Work months Solution
15 months back
Monday
February 20
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Counting back from today is Monday February 20, 2023 using a full calendar, and is also 11160 hours ago and 13.97% of the year.
Monday Monday February 20, 2023 was the 051 day of the year. At that time, it was 13.97% through 2023.