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**19 October 2018**** minus 45 days** will be

4th September 2018

For example

- What is 6 months before Today? (Today minus 6 months)
- What is 4 months from 22 August 2020? (22 August 2020 plus 4 months)
- What is 13 years from Yesterday? (Yesterday plus 13 years)
- What is 12 years from 2 August 2024? (2 August 2024 plus 12 years)
- What is 50 days before Tomorrow? (Tomorrow minus 50 days)
- What is 40 months before 13 January 2023? (13 January 2023 minus 40 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.