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**Yesterday **(18 July 2019)** plus 15 days** will be

2nd August 2019

For example

- What is 1 month before Today? (Today minus 1 month)
- What is 15 years from 1 March 2020? (1 March 2020 plus 15 years)
- What is 13 days before Yesterday? (Yesterday minus 13 days)
- What is 11 years from 7 October 2025? (7 October 2025 plus 11 years)
- What is 25 months before Tomorrow? (Tomorrow minus 25 months)
- What is 300 days before 24 August 2019? (24 August 2019 minus 300 days)

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.