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**15 October 2018**** plus 120 days** will be

12th February 2019

For example

- What is 2 days from Today? (Today plus 2 days)
- What is 500 months before 8 January 2024? (8 January 2024 minus 500 months)
- What is 50 weeks before Yesterday? (Yesterday minus 50 weeks)
- What is 13 days from 18 August 2021? (18 August 2021 plus 13 days)
- What is 730 weeks before Tomorrow? (Tomorrow minus 730 weeks)
- What is 40 years before 15 August 2021? (15 August 2021 minus 40 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.