##
**6 July 2019**** minus 90 days** will be

7th April 2019

For example

- What is 365 weeks before Today? (Today minus 365 weeks)
- What is 730 days before 9 March 2021? (9 March 2021 minus 730 days)
- What is 4 days from Yesterday? (Yesterday plus 4 days)
- What is 150 years before 7 November 2024? (7 November 2024 minus 150 years)
- What is 28 weeks from Tomorrow? (Tomorrow plus 28 weeks)
- What is 15 years from 13 December 2021? (13 December 2021 plus 15 years)

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.