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**19 October 2018**** plus 60 days** will be

18th December 2018

For example

- What is 60 days before Today? (Today minus 60 days)
- What is 800 days before 30 August 2023? (30 August 2023 minus 800 days)
- What is 1 week from Yesterday? (Yesterday plus 1 week)
- What is 600 days before 21 July 2019? (21 July 2019 minus 600 days)
- What is 800 years before Tomorrow? (Tomorrow minus 800 years)
- What is 300 months before 21 January 2024? (21 January 2024 minus 300 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.