**YouTube** is an American [online video-sharing](https://en.wikipedia.org/wiki/Video_hosting_service "Video hosting service") [platform](https://en.wikipedia.org/wiki/Web_platform "Web platform") headquartered in [San Bruno, California](https://en.wikipedia.org/wiki/San_Bruno,_California "San Bruno, California")

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Also, it provides a simple way to get the first or last business day of a month as well as the week number and check if a year is leap.

The Library is composed of the following activities:

*   DateTime as Input  
    \- Create Date  
    \- Date to string (including a wizard for custom formats)  
    \- Add To Date (formerly named Due Date)  
    \- Get First or Last Business Day of Month  
    \- Week Number  
    \- Compare Dates  
    \- Data To Date Calculator  
    
*   Strings  
    \- Compare Dates String (including a wizard for custom formats)  
    \- Date to Date Calculator String (including a wizard for custom formats)  
    \- Is Leap Year  
    \- String To Date (including a wizard for custom formats)  
    \- Week Number String (including a wizard for custom formats)

Dates activity library provide a set of activities for creating and formatting dates

Dates Manipulation Library