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**Tomorrow **(20 August 2019)** minus 3 days** will be

17th August 2019

For example

- What is 21 years before Today? (Today minus 21 years)
- What is 8 years before 1 November 2023? (1 November 2023 minus 8 years)
- What is 21 months from Yesterday? (Yesterday plus 21 months)
- What is 15 months from 6 October 2021? (6 October 2021 plus 15 months)
- What is 40 months from Tomorrow? (Tomorrow plus 40 months)
- What is 1 year before 31 October 2025? (31 October 2025 minus 1 year)

The **Gregorian calendar** is the most widely used internationally civil calendar. It is named after Pope Gregory 13th, who introduced it in **October 1582**.

The Gregorian calendar is a **solar calendar**. A regular Gregorian year consists of 365 days, but as in the Julian calendar, in certain years, a leap year, a **leap day is added to February**

The months of **April, June, September, and November** have **30 days**, while the **rest have 31 days** except for **February**, which has **28 days** in a standard year, and **29 in a leap year**.

For best results, please use dates after 1752 and **verify any data** if you are doing genealogy research.