##
**Tomorrow **(9 December 2019)** minus 3 days** will be

6th December 2019

For example

- What is 60 weeks before Today? (Today minus 60 weeks)
- What is 12 days before 6 July 2024? (6 July 2024 minus 12 days)
- What is 15 years before Yesterday? (Yesterday minus 15 years)
- What is 100 days before 12 January 2020? (12 January 2020 minus 100 days)
- What is 40 weeks before Tomorrow? (Tomorrow minus 40 weeks)
- What is 11 months from 21 June 2021? (21 June 2021 plus 11 months)

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.