New useful date functions

hi Team,

          In our regular project activities, we wanted to use these two Date functionalities but when we looked at std.date libraries we did not find them available. we thought adding them to library will be good in everyone's day to day project work.

find Nth week of Month for the given Date (Std.date.Date_t inputDate)

find Nth week of Year for the given Date (Std.date.Date_t inputDate)

Please let us know your concerns.

Regards,

Raja