A Duration is time period that may vary with with calendar and time.
Name of type concept copied from NodaTime.
Return first of month for year of date adjusted to given month. TODO WILL BE REMOVED IN FUTURE in favour of Field module.
A Duration is time period that may vary with with calendar and time.
Name of type copied from NodaTime.
Copyright (c) 2016 Robin Luiten
Add duration * count to date.