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**17 March 2019**** minus 6 months** will be

17th September 2018

For example

- What is 2 months before Today? (Today minus 2 months)
- What is 5 years before 2 March 2023? (2 March 2023 minus 5 years)
- What is 600 days before Yesterday? (Yesterday minus 600 days)
- What is 730 years before 12 March 2022? (12 March 2022 minus 730 years)
- What is 6 years before Tomorrow? (Tomorrow minus 6 years)
- What is 3 weeks before 6 January 2025? (6 January 2025 minus 3 weeks)

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.